Farcry achievement glitch?????

OK well today i was playing farcry instintcs predator on the xbox 360 and i got the Multi Champion achievement.. is this a glitch because this is what u have to do to unlock it and what it says on my xbox 360.

Multi Champion- Get ranked first 300 times in all multiplayer game modes.

This is what mine says Multi Champion - 300 games in whatever mode won.

Now is this a glitch or is it some kind of trick achievement... :D