"Print later" for everything. Then go to the "ready to print" page, left column, "print labels and print packing slips". With connecteasy it should print from both printers. Then refresh the page and/or on the right column of the "ready to print" search for the bundle you just made. Hit the print packing slips again.
Go from paper records to paperless. My team uses gmail for all messages, order shipment confirmations etc. Nothing gets deleted. Nice trail for searching orders. Hard to organize with spreadsheets or whatever, but easy to search records for one particular person.