sorry but this is incorrect and is just causing more confusion. if you have gcu it will show (for the last of us) $11.99, if you dont it shows $14.99. for everything else you are correct, but for this sale they have already calculated the gcu price on the website.
Remember they updated their terms that gcu wouldn't stack with Black Friday sales. Not sure if that includes this sale or not. The lower price that's reflecting on the website is the out the door price.