at the moment the used coupon code is only displayed/used when using the default templates for print and/or email. I’ll have to do something in the coupons plugin to enable that when using any other templates too.
Hi again, if you update wppizza to 2.16.11.1 and the discount/coupon extension to 1.4.6 you will now have an option to enable the coupons used to be displayed in the templates by simply enabling the adjacent checkbox