Hi Amber.
1) AC actually stores blocked appointments a little bit differently than regular appointments, so our phase 1 release does not copy over those blocked appointments. We've actually already started working on getting those blocked times over into Updox, so it is something that you'll be able to do.
In the meantime, you'll need the block those times in Updox as well. The easiest way is just to schedule an appointment during those times. You don't need to specify a patient, appointment type, or calendar, just have an appointment there and patients won't be able to schedule. Appointments without an appointment type or calendar won't be synced to AC, so it won't clog up your AC schedule.
2) It sounds like the appointment was cancelled on the portal, is that correct? These obviously should be removed from AC, we'll look into it.
3) We haven't seen this yet, we definitely want to see this "in action". I will actually be out of the office tomorrow, but I've asked one of the other guys to give you a call and we can investigate.