A big thanks to SimonSaid and BearBearBear for the helpful answers!,

After responding to a reseed request from someone (not me), I was able to download a torrent:  Flirt4Free - Jake Fisher (https://www.gaytorrent.ru/details.php?id=5d9de0507e5fd76e8d5af855a46fb55323534c2682410e51).  Now someone has asked me to reseed it, but when I do, it isn’t visible to them even though I see one seeder on the GT site and my own torrent page says it is seeding.  I want to help this person, but am not sure how.

Is the torrent dead or defective now?

Since it seems not to be visible, can I reupload it as an original torrent?

Another option is that, in addition to having the original flv files, I have converted them to mp4 files for myself.  These new files are more than 10% different in size.  I understand that GT rules allow me to upload these new format versions as a new torrent.  Is this correct?

Thanks!