Discounts won't stack, people syill paying shipping!

We are trying to make a discount that applies to the entire order ($25), but the shipping and tax is charged AFTER the discount is applied.

For example, if I’m buying a $17 item, and I am applying a $25 flat-rate discount, it will only discount $17 because that’s the order subtotal.

I am also trying to stack a “free shipping” discount on, but Webflow only allows one discount at a time.

Any solutions out there?!

Here is my site Read-Only: LINK
(how to share your site Read-Only link)