My AFAM quick change carrier is actually kinda sloppy loose side to side on the cush drives. It was that way when new. I was concerned about it and contacted AFAM. They suggested that was "normal." :

The stock steel sprocket was snug by comparison.
Anywhooo, I don't really think it's a big deal because the sprocket "locks" on to the cush drives when under power and kind of finds it's own center when backing off. A chain drive is not exactly a precision mechanical set up.
I guess I'd prefer a more snug fit, but FWIW I've done probably 5,000 miles on it in the sloppy loose configuration with no ill effects and it doesn't seem to be getting any worse.