Hi I've looked through the forums trying to find an answer to my problem which is that I've no achievements, it gives me the dashboard box which should have them displayed but there is just nothing there and when I do something that should have an unlock nothing happens.

I also have the problem of MP stat resetting I ranked up to lvl6 (I know mega high huh) I went away and came back on a few hours later where I was straight back at lvl1...I cleared my system cache thinking that it may help, as i went back into the game the update message came up so I downloaded it still nothing on the achievement side, played a few more hours on multiplayer, went on to single player, where I found some AI bugs, running into walls, seeing me while im in cover etc I also noticed that in stealth you still have a shadow in my opinion while it's not gamebreaking I find it takes away from the experience and it's lazy from the developers, anyway the next day I came to play multiplayer and found that I was straight back at lvl1, I enjoy MP but i dont wanna be leveling up to then find myself back at square one again and again

Hopefully someone will have infomation that can help me.

Well, that's because you are running it on your other xbox.