Hmm...that's a new one!

Personally, I'd be a bit nervous if I saw that, although if you haven't done anything illicit (not entirely sure how you would do something illicit and get miles for it, anyway--it's not easy to cheat AS's system), I wouldn't be too worried.

Maybe it could come out positive: AS thinks you're short on miles and wants to give you more!

(Sorry for this completely unhelpful post...maybe one of the AS employees can shed light on it in the morning...)