My site will go 'live' in a couple of weeks and I've installed this contribution a while ago. Now I'm fine tuning my site and I've made orders above 75e free for sending in the admin. When I use a discount coupon code for a order under 75e, it will not be used. When I use a discount coupon code for a order above 75e it will work. If I turn free sending off it will also work. I've looked over the code but can't find the solution.
Is there anyone who can help me? Or does have anyone else have the same problem?