I just checked in for my flight from DAB-EWR and the agent at the counter said that because of a weight restriction, i couldn't change seats. Tried to do it at the Kiosk, no dice. Tried to do it with the GA who told me that they couldn't move me 1 seat in front of myself to the window. I'm REALLY confused.

They also told a Plat that he would be stuck in Y with only 2 F seats sold because of the same thing

Any idea what this is about?