Every time I go into a game, I get enough kills to get me up to like, rank 3 or something (I only just bought this game)
Ok... thats fine.
Play another game... get to rank 4... all good..

Then when I leave the game (For example, get out of multiplayer and go back to the main menu) and then go back into multiplayer, my rank has reset back to 1?

It's done this at least 5 times now.

It's starting to piss me off because I hate being level 1 lol.

Does ANYONE else have this problem?