The appointment booking system if used from the wordpress admin interface:
- Easy Appointment
- Appointments
- Add new appointment by making a reservation, the system does not calculate spaces already occupied previously, but starting from the free time it adds the service reservation time, thus creating an overlap with a future reservation previously entered.
This happens from the wordpress admin interface. In the meantime, the web interface for customer reservation works fine
We are using:
Easy Appointments Version 3.5.3
Easy Appointments Connect Version 0.15.1

Note: In the settings Multiple Work is unchecked. Thanks for your help.
Regards