Is my purchase code set up correctly even though it is firing correctly in my pixel?
Sorry I didn't understand your question. What is your CMS Shopify, WordPress or others?
shopify
Did you Add Data layer on your Shopify Website : https://dev-freelancer-nurumiah016.pantheonsite.io/shopify-datalayer-enable-without-apps-for-lifetime/
Setup pixel browser side check Facebook pixel Requerment 👉 https://www.facebook.com/business/help/1021909254506499
Have you properly enabled Facebook pixel and data layer? 100% sure?