on the confirm page, do a find and replace,
find:
[FORMREF]
and replace it with:
CheckoutWizard_NewFromBlank_Default
for example:
<input id="CustomerEMail" name="CustomerEMail" type="hidden" value="<?php echo("".(WA_getSavedFormValue('[FORMREF]','Email_Address')) .""); ?>" />
should be:
<input id="CustomerEMail" name="CustomerEMail" type="hidden" value="<?php echo("".(WA_getSavedFormValue('CheckoutWizard_NewFromBlank_Default','Email_Address')) .""); ?>" />