diff --git a/.playwright-mcp/page-2026-05-20T18-28-03-362Z.yml b/.playwright-mcp/page-2026-05-20T18-28-03-362Z.yml
new file mode 100644
index 0000000..34fd26d
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T18-28-03-362Z.yml
@@ -0,0 +1,43 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 21 – 18. – 22. Mai 2026
+          - button "›" [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e21]: Mo 18.
+          - generic [ref=e23]: Di 19.
+          - generic [ref=e25]: Mi 20.
+          - generic [ref=e27]: Do 21.
+          - generic [ref=e29]: Fr 22.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+          - generic [ref=e42] [cursor=pointer]:
+            - generic [ref=e43]:
+              - generic [ref=e45]: Update 2026-05-20
+              - generic [ref=e48]: Belegt
+              - generic [ref=e51]: Belegt
+            - generic [ref=e54]: Test
+          - generic [ref=e56] [cursor=pointer]:
+            - generic [ref=e58]: Update 2026-05-21
+            - generic [ref=e61]: Belegt
+            - generic [ref=e64]: Belegt
+      - generic [ref=e66]:
+        - generic [ref=e67]: Frei
+        - generic [ref=e69]: Belegt
+        - generic [ref=e71]: Ausstehend
+        - generic [ref=e73]: Bestätigt
+    - paragraph [ref=e77]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T18-29-30-579Z.yml b/.playwright-mcp/page-2026-05-20T18-29-30-579Z.yml
new file mode 100644
index 0000000..8c312a7
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T18-29-30-579Z.yml
@@ -0,0 +1,37 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 22 – 25. – 29. Mai 2026
+          - button "›" [active] [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e79]: Mo 25.
+          - generic [ref=e81]: Di 26.
+          - generic [ref=e83]: Mi 27.
+          - generic [ref=e85]: Do 28.
+          - generic [ref=e87]: Fr 29.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+          - generic [ref=e88] [cursor=pointer]:
+            - generic [ref=e91]: Windows Update
+            - generic [ref=e94]: Windows Update
+            - generic [ref=e97]: Server Patch
+      - generic [ref=e66]:
+        - generic [ref=e67]: Frei
+        - generic [ref=e69]: Belegt
+        - generic [ref=e71]: Ausstehend
+        - generic [ref=e73]: Bestätigt
+    - paragraph [ref=e77]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T18-30-47-955Z.yml b/.playwright-mcp/page-2026-05-20T18-30-47-955Z.yml
new file mode 100644
index 0000000..b0036c1
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T18-30-47-955Z.yml
@@ -0,0 +1,33 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 23 – 1. – 5. Juni 2026
+          - button "›" [active] [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e103]: Mo 01.
+          - generic [ref=e105]: Di 02.
+          - generic [ref=e107]: Mi 03.
+          - generic [ref=e109]: Do 04.
+          - generic [ref=e111]: Fr 05.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+      - generic [ref=e66]:
+        - generic [ref=e67]: Frei
+        - generic [ref=e69]: Belegt
+        - generic [ref=e71]: Ausstehend
+        - generic [ref=e73]: Bestätigt
+    - paragraph [ref=e77]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T18-32-25-631Z.png b/.playwright-mcp/page-2026-05-20T18-32-25-631Z.png
new file mode 100644
index 0000000..92e39a9
Binary files /dev/null and b/.playwright-mcp/page-2026-05-20T18-32-25-631Z.png differ
diff --git a/.playwright-mcp/page-2026-05-20T19-48-35-519Z.yml b/.playwright-mcp/page-2026-05-20T19-48-35-519Z.yml
new file mode 100644
index 0000000..c69a127
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T19-48-35-519Z.yml
@@ -0,0 +1,3 @@
+- generic [ref=e5]:
+  - heading "Update-Termin buchen" [level=1] [ref=e6]
+  - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T19-49-58-304Z.yml b/.playwright-mcp/page-2026-05-20T19-49-58-304Z.yml
new file mode 100644
index 0000000..3b6b671
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T19-49-58-304Z.yml
@@ -0,0 +1,33 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 23 – 1. – 5. Juni 2026
+          - button "›" [active] [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e21]: Mo 01.
+          - generic [ref=e23]: Di 02.
+          - generic [ref=e25]: Mi 03.
+          - generic [ref=e27]: Do 04.
+          - generic [ref=e29]: Fr 05.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+      - generic [ref=e45]:
+        - generic [ref=e46]: Frei
+        - generic [ref=e48]: Belegt
+        - generic [ref=e50]: Ausstehend
+        - generic [ref=e52]: Bestätigt
+    - paragraph [ref=e56]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T19-52-53-560Z.yml b/.playwright-mcp/page-2026-05-20T19-52-53-560Z.yml
new file mode 100644
index 0000000..0d87e85
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T19-52-53-560Z.yml
@@ -0,0 +1,33 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 24 – 8. – 12. Juni 2026
+          - button "›" [active] [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e58]: Mo 08.
+          - generic [ref=e60]: Di 09.
+          - generic [ref=e62]: Mi 10.
+          - generic [ref=e64]: Do 11.
+          - generic [ref=e66]: Fr 12.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+      - generic [ref=e45]:
+        - generic [ref=e46]: Frei
+        - generic [ref=e48]: Belegt
+        - generic [ref=e50]: Ausstehend
+        - generic [ref=e52]: Bestätigt
+    - paragraph [ref=e56]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T19-54-22-699Z.yml b/.playwright-mcp/page-2026-05-20T19-54-22-699Z.yml
new file mode 100644
index 0000000..c789a59
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T19-54-22-699Z.yml
@@ -0,0 +1,33 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [active] [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 23 – 1. – 5. Juni 2026
+          - button "›" [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e73]: Mo 01.
+          - generic [ref=e75]: Di 02.
+          - generic [ref=e77]: Mi 03.
+          - generic [ref=e79]: Do 04.
+          - generic [ref=e81]: Fr 05.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+      - generic [ref=e45]:
+        - generic [ref=e46]: Frei
+        - generic [ref=e48]: Belegt
+        - generic [ref=e50]: Ausstehend
+        - generic [ref=e52]: Bestätigt
+    - paragraph [ref=e56]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/.playwright-mcp/page-2026-05-20T19-54-31-770Z.yml b/.playwright-mcp/page-2026-05-20T19-54-31-770Z.yml
new file mode 100644
index 0000000..255b88a
--- /dev/null
+++ b/.playwright-mcp/page-2026-05-20T19-54-31-770Z.yml
@@ -0,0 +1,57 @@
+- generic [ref=e4]:
+  - generic [ref=e5]:
+    - heading "Update-Termin buchen" [level=1] [ref=e6]
+    - paragraph [ref=e7]: Klicken Sie auf einen freien Slot zur Buchung
+  - generic [ref=e8]:
+    - generic [ref=e9]:
+      - generic [ref=e10]:
+        - generic [ref=e13]:
+          - button "‹" [active] [ref=e14] [cursor=pointer]
+          - generic [ref=e15]: KW 22 – 25. – 29. Mai 2026
+          - button "›" [ref=e16] [cursor=pointer]
+        - generic [ref=e18]:
+          - generic [ref=e88]: Mo 25.
+          - generic [ref=e90]: Di 26.
+          - generic [ref=e92]: Mi 27.
+          - generic [ref=e94]: Do 28.
+          - generic [ref=e96]: Fr 29.
+          - generic [ref=e30]:
+            - generic [ref=e31]: 08:00
+            - generic [ref=e32]: 09:00
+            - generic [ref=e33]: 10:00
+            - generic [ref=e34]: 11:00
+            - generic [ref=e35]: 12:00
+            - generic [ref=e36]: 13:00
+            - generic [ref=e37]: 14:00
+            - generic [ref=e38]: 15:00
+            - generic [ref=e39]: 16:00
+          - generic [ref=e97] [cursor=pointer]:
+            - generic [ref=e100]: Windows Update
+            - generic [ref=e103]: Windows Update
+            - generic [ref=e106]: Server Patch
+            - generic [ref=e107]:
+              - generic [ref=e109]: Update 2026-05-25
+              - generic [ref=e110]:
+                - generic: Belegt
+            - generic [ref=e112]:
+              - generic [ref=e114]: Update 2026-05-25
+              - generic [ref=e115]:
+                - generic: Belegt
+          - generic [ref=e119] [cursor=pointer]:
+            - generic [ref=e121]: Update 2026-05-27
+            - generic [ref=e124]: Belegt
+          - generic [ref=e125] [cursor=pointer]:
+            - generic [ref=e126]:
+              - generic [ref=e128]: Update 2026-05-28
+              - generic [ref=e131]: Belegt
+              - generic [ref=e134]: Belegt
+            - generic [ref=e135]:
+              - generic [ref=e137]: Update 2026-05-28
+              - generic [ref=e140]: Belegt
+              - generic [ref=e143]: Belegt
+      - generic [ref=e45]:
+        - generic [ref=e46]: Frei
+        - generic [ref=e48]: Belegt
+        - generic [ref=e50]: Ausstehend
+        - generic [ref=e52]: Bestätigt
+    - paragraph [ref=e56]: Wählen Sie einen freien Slot im Kalender
\ No newline at end of file
diff --git a/server/src/routes/bookings.ts b/server/src/routes/bookings.ts
index 55e61cb..785d9ea 100644
--- a/server/src/routes/bookings.ts
+++ b/server/src/routes/bookings.ts
@@ -34,31 +34,31 @@ bookingsRouter.get('/', (req, res) => {
   res.json(bookings);
 });
 
-// IT/AM manually create booking for a customer
+// IT/AM manually create booking for a customer → always creates a NEW slot
 bookingsRouter.post('/manual', (req, res) => {
   const { slot_id, customer_email, customer_name, customer_company, customer_location, cc_email, notes } = req.body;
   if (!slot_id || !customer_name) {
     return res.status(400).json({ error: 'slot_id and customer_name required' });
   }
   const db = getDb();
-  const slot = db.prepare('SELECT * FROM slots WHERE id = ?').get(slot_id) as any;
-  if (!slot) return res.status(404).json({ error: 'Slot not found' });
+  const originalSlot = db.prepare('SELECT * FROM slots WHERE id = ?').get(slot_id) as any;
+  if (!originalSlot) return res.status(404).json({ error: 'Slot not found' });
 
-  const booked = db.prepare(
-    `SELECT COUNT(*) as c FROM bookings WHERE slot_id = ? AND status IN ('pending','confirmed')`
-  ).get(slot_id) as any;
-  if (booked.c >= slot.max_bookings) {
-    return res.status(409).json({ error: 'Slot fully booked' });
-  }
-
-  const overlapErr = checkOverlapSlot(db, slot.date, slot.start_time, slot.end_time, slot_id, getDayCapacity(db, slot.date));
+  const dayCap = getDayCapacity(db, originalSlot.date);
+  const overlapErr = checkOverlapSlot(db, originalSlot.date, originalSlot.start_time, originalSlot.end_time, undefined, dayCap);
   if (overlapErr) return res.status(409).json({ error: overlapErr });
 
+  // Create a new parallel slot
+  const r = db.prepare(
+    `INSERT INTO slots (title, date, start_time, end_time, max_bookings, created_by) VALUES (?, ?, ?, ?, ?, ?)`
+  ).run(originalSlot.title, originalSlot.date, originalSlot.start_time, originalSlot.end_time, dayCap, 0);
+  const newSlotId = Number(r.lastInsertRowid);
+
   const bookingToken = uuidv4();
   db.prepare(
     `INSERT INTO bookings (slot_id, customer_email, customer_name, customer_company, customer_location, cc_email, notes, token)
      VALUES (?, ?, ?, ?, ?, ?, ?, ?)`
-  ).run(slot_id, customer_email, customer_name, customer_company || '', customer_location || '', cc_email || '', notes || '', bookingToken);
+  ).run(newSlotId, customer_email, customer_name, customer_company || '', customer_location || '', cc_email || '', notes || '', bookingToken);
 
   const booking = db.prepare(`
     SELECT b.*, s.title as slot_title, s.date as slot_date, s.start_time, s.end_time
diff --git a/server/src/routes/public.ts b/server/src/routes/public.ts
index d927631..5f6cf92 100644
--- a/server/src/routes/public.ts
+++ b/server/src/routes/public.ts
@@ -67,37 +67,36 @@ publicRouter.post('/bookings', (req, res) => {
   
   const db = getDb();
   
-  const slot = db.prepare(`
+  const originalSlot = db.prepare(`
     SELECT s.*,
       (SELECT COUNT(*) FROM bookings b WHERE b.slot_id = s.id AND b.status IN ('pending','confirmed')) as total_booked
     FROM slots s WHERE s.id = ?
   `).get(slot_id) as any;
   
-  if (!slot) return res.status(404).json({ error: 'Slot not found' });
+  if (!originalSlot) return res.status(404).json({ error: 'Slot not found' });
 
-  const dayCapPub = getDayCapacity(db, slot.date);
-  if (slot.total_booked >= dayCapPub) {
-    return res.status(409).json({ error: 'Slot fully booked' });
-  }
-  const overlapErr = checkOverlapSlot(db, slot.date, slot.start_time, slot.end_time, slot_id, dayCapPub);
+  const dayCapPub = getDayCapacity(db, originalSlot.date);
+  const overlapErr = checkOverlapSlot(db, originalSlot.date, originalSlot.start_time, originalSlot.end_time, undefined, dayCapPub);
   if (overlapErr) return res.status(409).json({ error: overlapErr });
   
+  // Create a new parallel slot
+  const r = db.prepare(
+    `INSERT INTO slots (title, date, start_time, end_time, max_bookings, created_by) VALUES (?, ?, ?, ?, ?, ?)`
+  ).run(originalSlot.title, originalSlot.date, originalSlot.start_time, originalSlot.end_time, dayCapPub, 0);
+  const newSlotId = Number(r.lastInsertRowid);
+  
   const bookingToken = uuidv4();
-  const result = db.prepare(`
-    INSERT INTO bookings (slot_id, customer_email, customer_name, customer_company, customer_location, cc_email, notes, token)
-    VALUES (?, ?, ?, ?, ?, ?, ?, ?)
-  `).run(slot_id, customer_email, customer_name, customer_company || '', customer_location || '', cc_email || '', notes || '', bookingToken);
+  db.prepare(
+    `INSERT INTO bookings (slot_id, customer_email, customer_name, customer_company, customer_location, cc_email, notes, token)
+     VALUES (?, ?, ?, ?, ?, ?, ?, ?)`
+  ).run(newSlotId, customer_email, customer_name, customer_company || '', customer_location || '', cc_email || '', notes || '', bookingToken);
   
   const booking = db.prepare(`
     SELECT b.*, s.title as slot_title, s.date as slot_date, s.start_time, s.end_time
-    FROM bookings b JOIN slots s ON b.slot_id = s.id WHERE b.id = ?
-  `).get(result.lastInsertRowid) as any;
+    FROM bookings b JOIN slots s ON b.slot_id = s.id WHERE b.token = ?
+  `).get(bookingToken) as any;
   
-  try {
-    sendBookingReceivedEmail(booking);
-  } catch (e) {
-    console.error('Email failed:', e);
-  }
+  try { sendBookingReceivedEmail(booking); } catch (e) { console.error('Email failed:', e); }
   try { sendWebhook({ event: 'booking.created', booking }); } catch (e) { console.error('Webhook:', e); }
   
   res.status(201).json(booking);
diff --git a/server/src/routes/slots.ts b/server/src/routes/slots.ts
index aad9535..ff0936b 100644
--- a/server/src/routes/slots.ts
+++ b/server/src/routes/slots.ts
@@ -70,10 +70,17 @@ slotsRouter.post('/', (req, res) => {
   // If customer data provided, also create a booking and update response
   if (customer_name && customer_email) {
     const bookingToken = uuidv4();
+    // Also create a NEW slot (don't reuse) so it appears as parallel block
+    const bookingDayCap = getDayCapacity(db, date);
+    const bookingSlotR = db.prepare(
+      `INSERT INTO slots (title, date, start_time, end_time, max_bookings, blocked_count, assigned_to, created_by) VALUES (?, ?, ?, ?, ?, ?, ?, ?)`
+    ).run(title, date, start_time, end_time, bookingDayCap, blocked_count || 0, assigned_to || null, session.user.id);
+    const bookingSlotId = Number(bookingSlotR.lastInsertRowid);
+    
     db.prepare(
       `INSERT INTO bookings (slot_id, customer_email, customer_name, customer_company, customer_location, cc_email, notes, token)
        VALUES (?, ?, ?, ?, ?, ?, ?, ?)`
-    ).run(slotId, customer_email, customer_name, customer_company || '', customer_location || '', cc_email || '', notes || '', bookingToken);
+    ).run(bookingSlotId, customer_email, customer_name, customer_company || '', customer_location || '', cc_email || '', notes || '', bookingToken);
 
     const booking = db.prepare(`
       SELECT b.*, s.title as slot_title, s.date as slot_date, s.start_time, s.end_time