Seems like a bug to me, but I'm no poker expert.
I was down to $400. Went all-in, won, had... I forget how much, enough to cover the big blind (I think) plus $800, so probably $2000 (should be the max I could have won) with 1200/600 blinds. Maybe only one other person stayed in and I wasn't in the big blind next. Next hand, big blind (I think), I go all-in with my final $800. Claptrap raises all-in, everyone else folds. I win the showdown, and somehow take all of Claptrap's $60,000+, busting him from the tournament.