on the confirm page, the form action is set to post to another page:
<form class="fallfestCheckout_checkout" id="Payment_fallfestCheckout_checkout" name="Payment_fallfestCheckout_checkout" method="post" action="payment.php">
it should be posting to the confirm page,
also the triggers for all the behaviors are set to trigger on any form post, they should be set to trigger on on the payment submit button being pressed.