@rosezbornak In addition to john's answer, if you have not downloaded EVERYTHING from that torrent, i.e, if you only selected a few files, that torrent will not count as completed in any circumstance, so don't expect to find it there. In that case you can find it in the "Leeching torrents" list.
First off you need to go to your torrent client and check the torrent's tracker status. If it says "unregistered torrent" that means it's gone and you'll not find it anywhere in the site. Any other status means it's still online, if you don't manage to find it in your torrents list you can just search for it.