Rec Chg unit price

When I do a receivable charge and need to add a line it always puts a unit price in the first line. Sometimes it adds unit price on the second line also. It is actually wrong because it shows price with GST and I take off GST after the full amount. I really don't like that feature and always go back and delete unit prices. Maybe have it so if you want unit prices they can be typed in on the appropriate line.