iTunes movies not going to Movies Anywhere

Not all of my iTunes movies are going over to Movies anywhere. Is there a reason for this. Everything is setup right. Some movies are going over and some are not. I just thought of this, but some of the movies I bought on iTunes and some I had to register through different means, but choose iTunes rather than Vudu. Could that be the problem? I'm not sure of which is which, but the movie I just bought on iTunes is not moving over to Movies Anywhere.