Modern Warfare 2 Glitch or Hacked Host?

It started with a daily clan meet-up we all joined up in a party and began a game. The message, "Daily XP Bonus" popped up. So I run out I am carrying a couple of Akimbo Rangers. I kill one guy and all of a sudden I am promoted to level 70 Commander. I personally did not want this. But, I have contacted Steam Support and IW Support. They looked at my account information and claimed that my level ups looked completely legit and that they have no record of me going from 49 to 70 instantly. Does anyone know how to fix this?

 

prestige?

 

No I had just started the game a few weeks back I was at level 49 no prestige.

EDIT: Did you mean go prestige to reset it?

 

Yah it will go to 1 with new emblem

 

I don't get why you're bothered. Surely it's a good thing?

 

You played on a cracked service , you usually need to pay to get on those the only way to go back to your orginal level is to cheat and change your stats to whatever desired.

 

Yah it will go to 1 with new emblem