Was happening to some of us. I kept playing with it. Finally, got it to go through.
Really?!? I just ended up placing two separate orders for a total of 4. No worries though. I sent them an email asking David if he could just combine my orders and refund one shipping charge. I'm cool with it either way.
On a side note: Thank you to the kind soul that sent the SuperT gift certificate. It was used to purchase the ELA flat buttons.