Me and my friend are trying to beat the co-op campaign on insane and we are having a problem. First, we are on the correct storage space because we have been using it the whole time now. When I go to continue campaign it loads us on the part we left off on but my friends difficulty has been changed to normal. When I go back to the main menu and go to select chapter it has the one we are on listed right there but when we go into it, it only says the first chapter of the first act is selectable as if we just bought the game. Please if anyone knows how to fix this let me know.