Im afraid I think it's more to with a fault in the game rather than anything your doing.

GK's ratings make no sense in this game. Last season I lost a game 4-0 but my GK got a rating of 8 despite losing 4 goals and only making 1 save. In the next game I won 3-0 and my GK got a 5 despite keeping a clean sheet and making 2 saves.

Like I said it's a fault in the game and until Nordeus explain it we will just have to live with it.