Updated CheckoutStep_Summary.php (#591)
Updated CheckoutStep_Summary.php (#591)

The 'updateConfirmationForm' form extension appears twice in the CheckoutStep_Summary class.  Remove it from the summary method, as it already gets called via the ConfirmationForm method.
silvershop/silvershop-core,burnbright/silverstripe-shop,hpeide/silverstripe-shop,burnbright/silverstripe-shop,burnbright/silverstripe-shop