If you are using integrated labels* via the 8.5" x 11" label with packing slip format (pictured below), you can contact our support team and request we enable a setting that always prints labels at the top of the page.
*Integrated labels are labels that print with the packing slip on the same sheet.
By default, ShipStation prints the label on the top portion of the document. However, if you are shipping multiple packages for a single order (what we call a multipackage shipment), all of the labels associated with the order will print first, regardless of which side of the paper they are printing.
This can cause the packing slip to be pushed down to the last page, and not print in the integrated way you may have intended.
Once we enable the "labeltop" feature for you, ShipStation will always print your label on the top portion of the page and the packing slip on the bottom. This will result in the final label printed always being integrated with the packing slip for that order.
As in this example: