Impossible to schedule two employees

I hired a second cashier for my gift shop so I could extend my hours. When I extended my hours, a second shift slot showed up. I am unable to assign my second employee to a shift, since selecting an employee automatically fills up both shift slots. I attached screenshots below.

Bugs aside, I’m loving the game so far!

It’s a known issue currently scheduled for alpha 6:

Currently there are no negative consequences if the same employee is scheduled for both shifts (he might however be gone for 1-2 hours in between).
The maximum length for one shift is 10 hours, so if you reduce opening times by one hour it will only be one shift.

Okay! Thank you so much.

Closing this as it’s now possible to schedule multiple employees. Just be aware that you can only schedule them for customer service, not for cleaning yet.