Alright, so I'm a dumbass.
Went to pay and had 8 games.
4x for the 4 for $40, that worked.
4x $10 games, I had a brainfart and thought it was 4 for 20...
Bad news is I used 2 $5 certs, but they applied to one of the 4/40 games.
Safe to say I can return the 4 $10 games and not effect the 2x $5...