2 separate coupon items

Hi,

By default, you can't use more than one coupon during the HikaShop Checkout.
So that is not a problem you should have.
Once you enter a coupon code and the coupon is added to the cart, you can't add a second one.
And even if you have coupons with the "auto load in cart if possible" setting activated, and that several of them match with the current cart, only one will be selected, the one with the highest discount for the user, and he won't be able to add a coupon on top of it.

The only way to allow for several coupons to be used is to install the "multiple coupon checkout" plugin from our marketplace:
www.hikashop.com/marketplace/product/164...coupon-checkout.html
The plugin will override the coupon system of HikaShop to allow users to add more than one coupon. In that case, there wont be restrictions on how many coupons can be added to the same cart.