have you been playing the same system for all the games?

If so, its possible that your opponents have been playing systems that means your CMs have had a hard time and you've had to get joy down the wings, not through the centre. In recent games, i've played a load of teams playing a 4-1-3N-2 so they've got 3CMs and a DCM against my 2 CMs and a DCM (i play a 451V mostly) so rather than having an extra man in CM, i now have 1 less, so my ratings on CMs have gone down and my wingers have been getting 8s and 9s every game.

Just a possible explanation for it