Sounds like fake files. I'm sure you've read about them on the forum
Yeah, sometimes Bitzi will give you a fake review too...that's a real pain. Try to go for a file that's had a few ratings (if the thing's got heaps of sources, it should have multiple reviews).

Have you tried using the All Types search rather that Video? That works for me. Search for movie - format (eg blahblah - avi). And stay right away from those files with heaps of sources. If you use the forum search to look for fake files, you'll probably find more info & maybe a few tips that you haven't tried yet.