Double bookings possible / Booking don't block period

Hi,

at the moment there is the possibility to double book (and therfore overbook!).
So several customers can book an appointment for the same time which results in too many bookings for the same time.

Pls Check screenshot: 3 Different Booking with 1 hour starting at 18:00 :-)

So: Is your meaing to block the time after receiving a booking manually or is it a bug that after booking and payment the timeslot will not automtically be blocked?

Thanks,
Chris