Hi @Mack999,
Thank you for sharing your question with the Klaviyo Community.
@julie.accardo is correct in that the solution will, to some degree, depend on your ecommerce integration.
Correct me if I am misunderstanding, but it sounds like you have created a coupon code within JustUno and are using this code in both Klaviyo emails. If you want to ensure that each user receives a unique coupon code, I recommend looking into using coupon codes in Klaviyo. We currently have the ability to generate single-use, unique coupon codes for Shopify, Magento 1 & Magento 2 stores. If you are using one of these integrations, you can simply generate and use a unique coupon code for each email. Otherwise, my recommendation is to create a new coupon code within JustUno, use the original coupon code for email A and the other coupon code for email B.
Thank you and have a wonderful rest of your week.