Am i at risk of getting my gamerscore reset?

ok so on gears 2 i wanted to get the rank 100 because i had realised that i was never gonna reach rank 100 unless i had no life, anyway i donwloaded a gamesave and it unlocked rank 100 but also a few other achievements seriously 2.0 and completionist but no pack rat. it unlocked around 400 gamerscore so i then completed the game to make it look less suspicios and let it drop to the bottom of my games list and also my privacy setting is set to friends only for game history. upto now it has been about 3 months but i am just hoping that microsoft will overlook this just because it is such a minority and you can hardly tell. i did not intend to unlock those achievements and also i cannot undo it. is there anyone out there who has anything similar to this and has not yet had there gamerscore rubbed out by microsofts gamerscore rubber-outer