Why isn't this game over?

Sorry to start a new thread, but I wasn't sure where this would fit. I am currently playing this game: Game 2701752. I think that I am beat, but for some reason I am being offered a move as if there is a legal move available. Why isn't this game over? Is it just a small glitch or am I actually still alive? (I know I am probably going to lose anyway - but I hate resigning)

http://www.conservativebookstore.com/chess/enpass.htm

En pessant

En Possent

thanks, I was really hoping it was a glitch - now I feel really stupid. Live and learn, I guess.

Somebody played Bxf7, 5 moves later is was trying to castle.