On Sunday, I took #134 (DEN-DTW). 737, so reserved 10A (exit window with no seat in front), checked in night before, wandered to the gate to board. Pretty normal day so far.

When I scan my BP, the error msg comes up that "Needs new BP For 11A" or something similar. Guy hands me a new BP and I ask if there was an aircraft change, he nods and I shrug and move on. The fact that it's the dreaded economy blue is bothering me a bit, but I dont pay it much mind. I get on and realize...it's still a 737, 11A is behind 10A and in regular economy.

I go back out to the GA and ask what happened, he says he's not sure, but the plane is full now, so nothing he can do. When the guy comes and sits in 10A, he turns out to be a non-MP member, and that's the seat he was assigned. Obviously, as a 1P, I'm not happy. Looking around seatguru when I got here, I noticed that, while the configs of 737's differ, there is ALWAYS a 10A.

Long story short:

Why would they do this?

Who should I email to ensure someone at least responds and/or reads it? (outside of the 'contact us' form on united.bomb)

Thanks....vent over