Thanks guys. I actually had done a search, which turned up that you can do challenges more than once (which I already knew), but I wanted to make sure there wasn't some other downside that wasn't covered. One of the reasons we're all here is that AA's rules are complicated, and it seems that a good percentage of the postings are warnings about or discussions of unintended ramifications from poor pax decisions based on AA policies that weren't understood in the first place.

So I wanted to ask the question. Thanks.