If you’ve created a discount code in both Shopify and Discount Mixer using the same code, the app’s discount may not apply correctly. To fix this, remove the original code from Shopify and then update your campaign in Discount Mixer to reflect the change.
If you're trying to stack a Discount Mixer code with another discount (created via Shopify or another app), it will work as long as the discounts don’t apply to the same products. In that case, Shopify treats them as combinable and applies both discounts at checkout.
If you’ve tried these steps but still aren’t seeing the expected results, please reach out to our support team — we’re happy to help troubleshoot.