purchasing a movie from itunes

I purchased the History of the Eagles Documentary from my itunes app uploaded fine and works great one question i have is that when I downloaded it when i got to my video app it had the correct title of the movie now one i backed up my phone to my comp it now shows a Andrew lloyd webber picture instead of the eagles pic but the correct title it plays great just a little weird why the picture change to that instead of the correct picuture that goes with the movie any input would be appreciated Thx Dianne