Same here, they actually told me ticketing was out all over the parks. That is what I get for waiting till the last minute I suppose. I will probably keep trying online tonight in case they fix the problem. I was on hold for 25 minutes before being told I couldn't buy them. Kind of frustrating, I would have suggested they change their message to reflect that the offer was extended, but they aren't open for much longer so probably not worth it.
I'd also feel more comfortable if it was in writing on their website.