I read further on after following some links that it had something to do with illegitimate saves. I'm sure there's a way to unlock achievements multiple times. I was worried that it had something to do with "omg urs iz 2 high BAN'TSTICK'D" over a period of time. If it's got a set system that it's going after, I don't foresee as many problems as I might imagine (my experiences stem from Ruststorm and Warden on Diablo II).