Appointments+ Can't Have More than 1 Service Provider

Hi there!

My problem is in the Appointments plugin -- when adding a new service provider, I'm not able to schedule any new appointments once the new instructor has been added, nothing is shown as available on the calendar -- the same times should be available, just w/ an additional service provider to choose from (At least, that's what I wanted to do!).

I have the original 1st service provider w/ 6 services selected, and under this new service provider, I only had 3 services checked. Once added, the entire calendar goes red, I'm not able to schedule anything. Once the 2nd service provider is removed (services unchecked) plugin works fine. Please advise!

thanks,
Will