Nothing we or the club can do kiddies. Just means they've sold more Cat 1 and Cat 2 then they expected, and are still getting calls for more, so have expanded the Cat 2 area into the (not yet sold out) GA.
I noticed that disclaimer earlier in the week when looking at the map - they reserve the right to change arrangements at anytime. They've realised than can make an extra $10 per seat, while keeping those punters happy, supply and demand. This will be a huge crowd.
Only thing to do I guess is pick a new bay, agree on it, change all the promos (banners here, facebook messages, twitter messages) and maybe leave some people standing at the entrance to Bay 30 during the lower grade on the night, directing people to the new bay?