Itunes movies not showing on all devices

I have an iMac where i host all of my movies purchased and downloaded. They show up just fine on the device. I can plug an ipad into the iMac and download movies and watch them no problem. However...Not all purchased and downloaded movies are showing up on my Mac Pro in iTV nor do they show up on my three apple tv's. I've checked that they are displayed in movies on my iMac and NOT in Home Videos. This is very troublesome as some of the movies were purchased as dvd's with digital downloads and stored on the iMac, some were purchased directly from iTV a long time ago...Any suggestions or ideas?