I was playing call of duty Combat training one day. When I died, I was surprise when I hover my mouse over the class, it says there which was suppose to be a picture of the gun inside the class, select this class. I selected a class which was suppose to be using a gun Enfield. When I selected it, it used the class. So I said, It might be a glitch or a bug. Then when i ended the match, then later on, I played Combat training, BOOM! No more classes, back to level 1. I remembered I was Level 29 or 30! PLEASE HELP ME! I think I pressed the ~ key. Then I was figuring out how to remove it by punching in so many keys before this "glitch" happened. I'm using mac.