You cheated, I know this is since I used part of the community that makes this kind of stuff.
If you're going to try and prove that you didn't mod your achievements using a program called "Profile Editor 2" you can notice it easily.
1) How come your service record says you haven't beaten Campaign yet, yet you have all the campaign achievements? Damn that's a fail.
2) How did you manage to get Endure, Deja-Vu and Classic when your played campaign on ODST DOESN'T say that you did. Fail.
3) You Cheated Annual since you haven't even beaten the Campaign, just look at your played Campaign history, you haven't even played Halo only Sierra 117, Crows Nest, Tsavo Highway and The Storm on Normal. FAIL
4) 7 on 7 you modded since I didn't relise you could get it on June 30th. FAIL
5) I've noticed almost all of your ODST achievements are modded.
FAIL
You sir are the reason they've made anti-resigners. You should be ashamed of yourself.
Go cancel your live account and DO IT AGAIN!
P.S You're quite the noob when it comes to cheating aren't you.
[Edited on 07.02.2010 1:30 AM PDT]