Invoice Discount

grapeman

For some reason I sometimes cannot apply invoice discounts. It appears to be totally random.

For example: I add items to an invoice and enter the amount in the Invoice Discount box, and the discount is applied as expected. I can save/email/print this. If I add an item the discount will still be applied but the invoice reverts to the previous version the moment I try to save. If I add yet another item it will then save again. If I try to delete that item, it won't save. I've tried substituting various items and there seems to be no rhyme or reason. Sometimes it works, sometimes not.

All items are same Account item, same Tax Code, and often the same price. They just have different Item names.

Help...