Capacity count in Appointments+

I seem to be having a problem with capacity settings in this setup, http://www.z-surf.com/sup/?p=1
I noticed after a few tests that the days available or "free" quickly became "busy" after only 1 reservation. so I changed the capacity to 100 for each type of service and still those days are not available. how do I reset those values? If there a way to see how many are left on a particular day or time slot? And just to be sure, take a look at the site and what I plan on renting and tell me if there is a better way?