Appointments+ Back-end time slot not working.

On https://bg*********r.com/s********pt/ (URL given in chat) I want to offer 4 times: 8:30am, 10am, 12:30pm and 2pm.
With a fancy break schedule, I think I got that working. What's not working is the time slots on the backend (Screenshot given in chat). Can you please tell me how I can fix that?