Hahaha
I guarantee you if that would work I'm going to book 5 F awards in a heartbeat and cancel next week ^
As stupid and incompetent AA's IT is, unfortunately they havent reached this level yet
I guess with a cancellation they just reverse the movement instead of crediting 100K new to the account. You should think the accountants have an eye on this as miles are a liability for AA. So they have to follow where they come from and for what are they spent.