I agree, you'd think they'd learn from previous problems/mistakes.
When the ticket office rang me yesterday they said that these tickets had been returned so I'm assuming that rows A and B had already been sold and not held back, I don't know if that's true or not though.
As for sitting, I'd rather sit than stand but if those in front stand up you have little option but to do the same unless you want to risk getting into an argument.
My reason for wanting to be further back has nothing to do with the standing or sitting debate though, I just prefer to be higher up in the stand so I have a better view of the game than that provided from the rows near the front. I know others prefer the opposite so I'm hoping that someone might want to swap, if not, then hopefully everyone on the first few rows will behave and be considerate to those behind them who can't stand throughout a game.