As they are not counting them I can't see how they can work out an official attendance. You can't just say every season ticket holder was at the game, because quite often fans miss a couple of games a season even though they have a season ticket.
You can't also just give out an attendance of normal ticket holders, and not include season ticket holders, which is what I think Swindon did against Blackpool, as this would give a figure much lower than want it really was.
Most fans seemed to think there was between 6,000 and 7,000 inside the ground on Saturday, not 5,000.