Preventing and Fixing Double-Booked Appointments

A double booking usually isn't random — it almost always traces back to one specific gap in how availability is being calculated. Here's how to find it and close it.

Common causes

• Missing conflict calendars — if a staff member has personal commitments in an external calendar that isn't connected as a conflict calendar, that time won't be blocked and can get booked over.
• A team member not connected at all — on round robin or collective calendars, every staff member needs their own calendar connection; one person left unconnected creates a blind spot.
• Manual bookings entered without checking existing appointments — staff entering a booking by hand can override the automatic conflict check if they force it through despite a warning.
• Buffer time not configured — without a buffer, back-to-back bookings can land close enough together to functionally overlap.

Diagnosing an existing double booking

1. Open the conflicting appointments and check which calendars and staff each one is tied to.
2. Check whether the staff member's external calendar (Google, Outlook, iCloud) was connected and set as a conflict calendar at the time both bookings were made.
3. Check the timestamps both bookings were created — if one was entered manually, confirm whether a conflict warning was shown and overridden.

Fixing it going forward

Connect every staff member's calendar individually, mark the right external calendars as conflict calendars, and set a sensible buffer time on any calendar prone to back-to-back scheduling. Where manual bookings are common, make sure staff know not to override a conflict warning without a real reason.

Good to know: A calendar's built-in troubleshooting tool can show you exactly which users are in conflict for a given time slot — use it before assuming the cause rather than guessing.