I just purchased my 2nd Borderlands 2 game and again, on the 2nd game, it gets to the start screen, i hit start, it looks for downloadable content and then says unreadable disc. I thought that it was the disc, but now that I purchased the 2nd copy, it seems to be the game. All other games play as normal with no interruptions. I have unplugged all cords, cleared content cache and have moved all saved data off the Xbox. Any suggestions on how to fix this?