Appsumo not allowing double code stacking

It’s only allowing the first code and there is no way to stack it. please help

Thanks for purchasing from Stacks,

Regarding how to stack, follow this tutorial https://youtu.be/4KeHyXr2LCU and add them here https://stacksmarket.co/checkout/ as shown in the video, Apply all your coupons and click subscribe, That’s it and your projects will be assigned correctly

Let us know if you faced any issue
Thank you

Hello!

Can you please make sure you followed all the steps in the tutorial? here is a link to the tutorial

https://www.youtube.com/watch?v=4KeHyXr2LCU&feature=youtu.be

If it is not working, please send us the coupon that is not working correctly by mail at support@stacksmarket.co to validate from our system and from Appsumo that the coupon you have is correct.

keep me informed