Originally Posted by Westcoaster

Any chance there was an equipment change? That can disrupt seat assignments. Also, whenever I pre-reserve seats on the 737-900 I find that row 16 is blocked and unavailable to an MVP. I've assumed it's related to the fact that there are (I believe) 2 different seating configurations, one with exit rows 14 and 15 and one with exit rows 15 and 16. I don't know why you would get bumped, however.

There's always the sky marshall theory. Did you get a good look at the warm body in 16D?