I apologize to everyone, I'm extremely embarrassed that it did not work correctly for some people. I believe it has something to do some people's system clocks being off, which allowed people to see the button and click it before the page was live, which locked you out of the sale. I will be spending a lot of time fixing this, and there will be a quick test page that I would ask you all to participate in before I go live with the next sale.
Thank you for your patience, it is much appreciated. Invoices will be going out shortly.