Many many times companies sell products that they do not typically carry in stock or even have formally setup in their systems. These products are ordered from vendors who then ship to customers. When these Sales Orders are created, they are converted to PO and sent to the vendor. These products MUST show up on the PO. They must also show up on Packing Slips and it must be possible to print shipping labels for them. This is how business works. It's not good at all that Zoho doesn't show these items on PO's, etc.