Topic: random tracker drop/loss

I noticed tonight looking at the original post for one of my seeds, it was telling me to download the file to seed it (again). Looking into my torrent client, it was alive, active and happy - and even showing the same number of active seeds as reflected on site. All my other seeds are fine. Any idea whats going on there? Im sure if remove it from library and download it again, all will be well, but im more interested in whats causing/caused the behavior.

From the wreckage of humiliation
I got my self respect
I pulled myself together
What the hell did you expect