Hello Wouter van Maaren

Thank you for your purchase.

This is because you set your default time slot step to 4 hours. The time periods in Amelia need to be dividable by the default time slot step, and it's not defining your working hours, service durations, working hours or anything else. It just gives you different time slot step options.

If you set the default time slot step to be 10 minutes, you will be able to create working hours at 00:00, 00:10, 00:20, 00:30 - this is up to you to choose when your employee is going to work.

If you don't need anything less than 1 hour, the time slot step should be set to 1 hour.

Then, you can enable "Use service duration for booking a time slot" below it, so when you create a 4-hour long service, the available time slots will be shown in your employee's working hours.

If you configure the work hours of the employee so he works from 09:00 - 22:00, the first time slot will be from 09:00 - 13:00. Then, if the service has a 1-hour buffer time after the service, the next time slot will be from 14:00 - 18:00 but the last time slot will not be displayed because of the buffer time.

The buffer time would allow the next time slot step to be at 19:00, but add buffer time to that, and the next time slot would be from 20:00 - 23:00. Your employee's working hours need to be from 09:00 - 24:00 to accept 3 4-hour long appointments with 1 hour of buffer time in between each appointment.