I'm having trouble getting Lot/Serial Numbers to display on SOME (not all) of the sales invoices. We ran a few tests with test products and test Lot/Serial numbers, and for those tests the serial numbers displayed on the sales invoice. But I just put in the first real sales order, and no Lot/Serial numbers are displaying on the invoice. I do have the setting, "Display Lots & Serial Numbers on Invoices", selected. Is there any other setting that I need to select? Am I missing something during the process of making a Sales Quotation and Sales Order?