Uploading means somebody else downloading one of your files...then you see it as an upload

You're probably seeing fake files, they're common on the network. They'll sit connecting for ages, then get stuck needing sources forever. Always check movie files with Bitzi before download. If a file has heaps of sources but no Bitzi rating, chances are it's a fake
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There's a lot more info & tips in these 2 threads, including info about using Bitzi. The threads are referring to LW but still apply to FW.
Fake files showing up in search results
How to find music
(tips for movies also)