Nothing to add except that I will be eager to see how people handle this, too. If shipping charges are involved, then it's tough to keep items on just one invoice with different ship dates in the detail, because you lose the amount charged on each invoice. The shipping charge might be split on both, or only on one invoice .... So if a customer calls and asks a question it would be hard to recreate the actual invoice much less reprint the exact invoice that was sent out. However, you do want to associate the 2 invoices together as they were one "order".
I struggle with this too with one of my clients (so far we keep on 1 invoice but don't like it) Karen
