Appointment Test Connection Works, but nothing else

Hello! I'm in love with the Appointments plugin. I have set up on several sites; however, i am having some issues with 1.

What I am attempting to do is set up about 10 service provides on one main google calendar, but their own sub calendars. That way they can all see each others schedules. They have their own API's setup and the "Test Connection" works, but the appointments don't sync up.

Any suggestions?