I don't know what exactly is going on, but it's not because he changed the text file or FFP or whatever. The torrent is showing a single seeder ( I assume bryonsos) at 100%, and all the leechers at 99.97%.
If he had changed the text file and/or, he would not be able to get to 100% himself. But that is not the case, because he is at 100%.
Like I said, I'm not sure what the issue is, but it's not because of the semi-common text/FFP minor change.
and, for the record, changing the description field at bt.etree.org only changes what is displayed on the website, and does NOT affect the torrent files at all. You can go ahead an edit the description as much as you like, as long as you don't touch the actual files on your computer, you should be fine.
edit:
for lack of a better suggestion - maybe try deleting the torrent from the torrent client. then re-load the torrent file into your torrent client. it'll re-hash and re-check all the files. You should still get to 100% and show up as a seeder. perhaps that will force reset the connections to all the other peers, and you'll be able to finish the upload. I don't know if that will work, but it's worth a shot.