Friday evening I was on a CRJ-550 flight from ORD that was about 2 hours in length. I boarded near the end as I honestly lost track of time in the United Club... plus just had one backpack that goes under the seat.

I had 4A reserved when I bought my ticket in F. I boarded and First was full except for 1A.... 4A was occupied. I started to speak to the person sitting there as I arrived and they said "Your new seat is 1A." I asked if I could please have their name because I couldn't see it. They asked me "What? Why?" I said well, you must work for United. "No... " Okay, so is the gate agent bringing me a new boarding pass? "Why would they?" Well you said 1A is my new seat so I need the boarding pass to ensure I'm correctly boarded on this flight.... I wouldn't want to be marked a no-show. Flight attendant came up, addressed him by name (assuming he read the name for 1A) and told him that row 1 came before row 4 so he might have gone too far into the cabin. Guy got up looking pissed and went back to 1A.