Any Solutions?

[Exploseth]

It happened when I got Halo CEA for Christmas and I Beat it Offline at my Mom's place then when I Came back to my Dad's house and got on XBL on CEA, All of my achievments were erased and I had to reset my Campaign progress and do it all over again. I recently got the achievment "Dear Diary" which is to find all of the terminals but the funny thing is, I don't even have the achievment for getting half of the terminals. Can I fix this without reseting it?

[Mr Biggles]

because you added your profile to your Dad's place, and, all offline achievements when a profile is moved are erased, so you lose all offline achievements.

[Exploseth]

Yeah, I figured that out. I have most of the Achievments, Only missing 200 gamerscore on it. I'll Just have to reset my campaign progress and get half of the terminals to get the achievment.

[Azaxx]

this happened to me when i did halo wars, i lost over half of the achievements D:<

[M4sT3r Ch13f S117]

That must suck after you spent time getting those.

[ShockGazm]

That's one hell of a problem, sorry can't help you there.

[Mr. DJ]

I did that and it was fine for me...