This came up from an issue we noticed where changing the quantity of a line in the basket online caused the discount line to recalculate and revert to the standard sell price.
It was subsequenrly removed and re-added when going back through the checkout process but it would be good if a flag could be added that could stop it changing - in this case the negative discount changed to a +£9999,99 quote line.
A flag on products to stop this happening (delivery charge products etc) would be great
