@Richiroma I think the star rating on the torrent list is the average of the votes to date, even if there aren't three of them. It's odd that the search page rating is done differently from what's on an individual torrent page, but it's likely a "feature" of the software that would be painful to change--and unnecessary.
I say "unnecessary" because I don't think the ratings are used consistently by members: Some people give five stars as a way of saying "thank you," and there's at least one troll who puts one star on torrents that he doesn't like...which seems disrespectful to the uploader. (When I see one of those, I do a five star rating so it averages to three.)
Rather than using rating stars to assess a torrent, we can look at how many people said "thank you" on the torrent page and/or how many bonus points were awarded. That said, we all have different tastes. For example, I'm not at all interested in seeing two completely shaven twinks fucking, but there's still an audience for that and it could get lots of applause from people who like that content.
Sorry for the long essay. Maybe I had too much coffee this morning...