Last night my friends told me look at my combat record and I saw my RPG had +200000 kills. WTF?! Other weapons had also had a high numbers of kills. Some had over 40000 kills. Another thing is that when I Prestige last night and I chose the extra custom slot I DIDN'T GET IT. I suppose to have 9 but they took 3 away and yes I did report it.
Some times the rediculous amount of kills you see from weapons, leathals, killstreaks are bugs that people get from accidental stat reset which results in seeing crazy amount of something. Peole have reported having millions of attack dogs kills(which is a bug/gltich) when they have actually never used them and have no calling card completed for it.