I have come across three torrents for the same thing ( Doujin PC Game Immaterial and Missing Power Touhou 7.5). Although all three are packed in a slightly different fassion, It is easy to miss the fact that there might be a seeded version.
The following are the three torrents:
TH075.torrent (id=1738) Immaterial and Missing Power.rar.torrent (id=6823) Immaterial and Missing Power.rar.torrent (id=6823)
Only the last one has peers (and with the tracker not reporting peers/seeds, it looked like all three were in dead water).
For things like RAWs, Videa, and possibly even audio, different versions are fine since there is often a variation in qualitity, size, etc. For things like games, having multiple torrents of the same version is confusing.
Perhaps the other two torrents could get purged.
That is all, thank you for your time.