It sounds as though you are using your original torrent file, I may be wrong. Or you are not pointing your torrent file to the right place.
You need to download the torrent you have uploaded and use that to open the torrent. When your torrent client asks where to save the file you point it to the exact file that you made the torrent from, not just save it to your usual folder. If you open as usual your torrent client will try to download, not seed.
Some torrent clients say they will overwrite the file, they don't