Movie Purchase problom

Hi,

I bought Cars 2 movie on my Ipod touch 4g, and I downloaded, watched, and then deleted it because I knew it would be in my iTunes account. But when I check for my purchases on iTunes, it finds it, downloads the movie, but when I when I looked at it more closely, it was just the iTunes extras part, no movie. I really thought the movie downloaded because it said downloading Cars 2/ iTunes extras/ Pixar, and the file was over 500 megabytes. So please help. If I can't get this working I just used 15 bucks to watch the movie ONCE!!! Thanks again.