All the tickets (including our APs) that we purchased at AAA were actually "vouchers" that had to be exchanged at Guest Services (either in the park or Downtown Disney) for the real deal.
We haven't purchased from AAA since moving back to PA, so I'm not 100% sure how it will work for scheduling FP+.
At least this will bump the topic up and more will see it. Since we haven't used
MDE and haven't made FP+ (we're going to wing it for our trip early May), I can't be sure about doing that.
Good luck!