Free Shipping Applied to Sub-Total or Final Total?

This is a critical issue with our store that no one seems to be able to fix.

We have free shipping set up for all orders over $100 but if a customer uses a coupon and the order total goes to below $100 they still get free shipping. We have got to find a way to stop this from happening.

shopify please get this fixed. This is a major bug in the system.

Hello @Oceanbuy !
To prevent this, you may try iCart App. This app will help you by providing free shipping over the $100 cart amount automatically in the cart. Your customers will know the offer from your store and the offer will appear on top of your cart.
Hope this is something helps you out.