Hi Paul,
Thanks for your feedback. This is a very good point, we haven't had this scenario presented to us before. We will look into this as a possible change, however across the board we haven't had this issue raised before and any change we make in the software would of course affect every user. Please bear with us and we will look into it.
Don't see why it needs to effect everyone, it just needs a tick-box adding like the existing "Show discount on invoice" setting, in the customer's set-up page. As mentioned, it would save us a great deal of everyday pain here.