I know that there's more evidence than just the ordering, but check out my Easter Medals. I got the medal for scoring 14 mil BEFORE I got the medal for 10 mil.
This isn't because I hacked; I'm a fucking moron with computers and I can provide ample screens to prove I spent (read: wasted) over four hours on that game to no avail. The reason was that my connection flipped out in my attempt to gain the last 3 medals (scores and trophy boy) so my playthrough was met with failure. I only saved before Easter Bunny, so when I restarted I got that medal and had to redo the playthrough to get the trophy and 10mil medals.
I'm not saying he's not a cheater, he's SAID he was, but having medals out of order doesn't always mean that you've hacked the games.