There are 2 workers in the same location, and they provide different types of services. If I make an appointment for ex. at 12.00 for a service provided by worker 1, then the callendar will show that 12.00 oclock is reserved. But if i select a service provided by worker 2 in the same loction, after doing the reservation for worker 1, then 12.00 will not show as reserved, it will show as available. What can I do to resolve this problem?