I already had Nuketown Zombies with the bonus code when I got the game. I have green mile maps currently. I bought the season pass thinking there would be more maps. But, I do not see any new content after I downloaded and installed this season pass? Am I wrong b/c I did not receive anything for my purchase. Please help clarify what I should have received or will be receiving or where I can check to confirm I have all maps and bonus maps for seasob pass holders.