Locked achievements resetted to 0%

This problem happended 40 minutes ago and is rather anoying. I was playing FH2 and suddenly all of my achievements in the achievement app were reset to 0%. When I perform an action towards these achievements they update for a second and then reset to 0% again. Also it doesn’t appear to be limited to FH2 only as I got the same problem in FM5 as well, basically all of my games. The affected achievements are: Grand Prix Vetaran (FM5), Worthy of a Sultan, Team Player, Horizon Enthusiast, All Your Race Are Belong To Us 2.0 and You Are Playground Games but, as I said, it seams to be affecting all games and all achievements. It is apperanly profile related. A hard reset did not help and I don’t know how to fix this problem. Any hints or ideas?

I suspect it is just a temporary xbox live server glitch that will fix itself. Check again tomorrow.

I just checked and the achievements are back to normal. Thanks for your help!