Won the BF109-10 in Strike?

[Robotic Pope]

They are all screwy. I have a printed list of the unlocks and put a mark down next to it each time I play/win a game or number of kills whichever the unlock needs. I'm sure I remember each time and certainly don't accidently put too many marks. But very often I go over the required amount without geting the unlock. At the moment im trying to unlock the P-51B 500lb bombs which requires you win 15 strike or CTA games with the P-51B, Well i'm now at 19 wins and no 500lb bombs.