I can not explain this behavior.
What I do see is that Hevilesti, iskyoung and MNG are all from Singapore and have a dynamic IP.
It could be that your ISP is not so strict with privacy and might deal out your cookies to other people, and vice versa. That is the only explanation I can think of.
That it happened on this torrent is probably just a coincidence as I can find nothing 'suspicious' on that page.
Solution: ask demand from your ISP that they stop fooling around and starting offering proper Internet, not some kind of shared crap.
--Jarudin--