I have a similar problem. Though my settings show I have 5 upload slots and none are used. In winmx i have over 100 in my queue in less than 2 minutes and the same files here i never see anyone uploading at all. I share almost 1000 files.

I use zonealarm pro 5

Also when i set a file to download, within 2 minutes it needs more sources. So I tried searching for it again (repeating the search) and there it is again, same ip too. Other times more than one user that has it shows yet it's always set to needing more sources.

Anyone have any ideas?