What You Might Be Seeing
When one time slot is booked for an Appointment Type, time slots in other Appointment Types disappear.
Why You Can’t Book the Same Time Slot Between Appointment Types
When an Appointment Type is booked in a time slot, all your other Appointment Types are blocked from getting booked in that same time slot. Simply Schedule Appointments works like that by default.
For example, if you have a 1 hour Phone Call Appointment at 11:00 AM booked – then another client can’t book a Video Call Appointment at any time between 11AM and 12PM.
How to Make Appointment Types Independent from Each Other
Sometimes you need to change this setting.
For example, if you have multiple Appointment Types each tied to a Meeting Room, then you might want to have all the meeting rooms be booked at the same time.
To let multiple Appointment Types be booked under the same time slots, you can change this setting by going to Settings > Developer Settings (at the very bottom of the page) > and turn on Give appointment types separate availability.
Note on the Business Edition
A better way of managing schedules and availability for multiple staff, resources, and/or locations will be included in our upcoming Business Edition of Simply Schedule Appointments.
However, in any edition of Simply Schedule Appointments, you should be able to give each Appointment Type its own independent availability.
This should let you to set up a different Appointment Type for different people or different resources, and manage the schedule for each individually.