Achievements gone?

[replica]

I was going to play story mode to get the rest of the achievements when I noticed that I now have zero for PSU. I forget what score I had before, but I've beaten all the bosses in free missions already.

Does this happen often? Because if I have to this reoccurs after Sept 6, I'll be stuck at zero again permanently.

[Shadowth117]

I was going to play story mode to get the rest of the achievements when I noticed that I now have zero for PSU. I forget what score I had before, but I've beaten all the bosses in free missions already.

Does this happen often? Because if I have to this reoccurs after Sept 6, I'll be stuck at zero again permanently.

If you're absolutely sure you already got the achievements on that account, literally the only way to lose them is to be branded a "cheater" by Xbox live. This would have reset your gamerscore on every other game as well and stop you from re-earning any achievements you lost.

No idea otherwise. I've never heard of people losing achievements randomly.

[replica]

I still got the achievements for all the other games. PSU the only one that's a 0. There's something in the Xbox tech FAQ about achievements for AOTI not being added but I'm not sure if this is the same thing.

Addendum:
I re-earned one achievement and now in the list of achievements it says I've got 5 of 13 for 250 points. When I click on it to view the specifics it says I've got 1 of 13 achievements for 50 points. Weird.