Recently, I got high speed internet, and when I connected with the first Gears of War it reset all of my achievements. This would not be a big problem, except with the cog tags. I had collected all of them, and when it reset the achievements it did not reset the cog tags in game (30/30 on pause menu). I tried deleting the game info, deleting the system cache, and recovering the gamer tag. None of these worked. (I also tried playing with another that had none on co-op and neither could I pick up the tags, nor did the achievements get credited to me when the other picked all of them up and received credit.)
Do you know of anyway I can either regain credit for the achievements or reset the cog tags (there must be a file somewhere)?