[rosc2112]

In Azureus, if you right-click on a running torrent, you have the option to 'show details' .... Under the Peers tab (after opening the details) you have a column called "source" -- If you have leechers coming in from anywhere but "tracker" you're feeding people but not getting that upload counted by the tracker.

Also, when you right-click on a running torrent, there's an "advanced" menu item, which has a "peer sources" menu item, where you can de-select all of the other options except "tracker"