To process batch with shipments that have multiple boxes you will need to add a column to your spreadsheet:
- Box Number - the current sequence number of the box in the order (i.e. 1,2,3)
Once this column have been added, set the column appropriately on your import file so that you have a row for each order's box (matching order number, but different BoxN). The system should then combine these lines into a since shipment per order number.