different number of timeslots on different days

Hello

I'm trying to setup a service where there are different number of employees available on different days within the same service. Unfortunately I don't get this to work.
Please see the wanted setup in annexe.



The picture below shows the frontend for the saturday. According to the picture above there should be three time slots on this saturday (this is correct) but there should be 4 seats available and not just 2.



What am I doing wrong?

Thanks