Same thing happen to me, but only for the first one. If you buy multiple copies of CoD on the same receipt, all the ones after the first will ring up $5.
Which version is it? What other games have the $5 off? I don't remember seeing this in their ads. I'd make another trip just to get it if it's the xbox version. almost bought it during GS B2G1 a week ago.
I went yesterday and found some sitting next to one of the computers. But when I tried to use it to get ninja gaiden black, it wouldn't automatically take off $10 in the computer. When the cashier took the coupon to ask her manager, they said it only works for PC games since it's an ATI...
They have a new deal now where if you buy 5 $14.99 or under games, you get another 5 for free. I'd imaging the 5 lowest priced games would be the free ones. So if you can find 10 games that are the same prices (i.e. all $6.99) then it's like BOGO.