Issue with availability

I recently installed JoeBooking which is perfect for what I need but I am getting a weird issue and I am not sure where it is coming from.

http://hammerdev.oru.edu/reserve/

This is the page where my scheduling is set up for my clients. My issue is that I cannot seem to add more than one entry to the availability options. Currently my availability is set to M-F 8am-8pm for 60 min each however Sunday and Saturday are also showing on the system for a short number of weeks and then disappear.

I cannot seem to get it to add my availability properly. I need it to display the following:

Sunday – Closed (No Availability)
M thru F – 8am – 8pm (60 min each)
Sat – Noon – 8pm (60 min each)

I have even tried to do this directly into the database but cannot seem to locate the table for modification. Can someone help me here?

https://wordpress.org/plugins/joebooking/