-I split the order into two items -open order details -selected to "configure shipment 1 of 2" -entered info for shipping just for that item -click Add to Batch in Order Details -Both items appeared in the batch and when I processed it they both came up with two separate packing slips and labels - had to remove the unwanted item from the batch manually to avoid creating labels for both items when one was not yet available to ship
During a chat with customer service, John found an alternative fix to get only one item in the batch after splitting a shipment
-split the order into two items -search for the order -selected one of the two lines for one shipment -Other Actions > Add to Batch -Only that shipment appeared in the batch and when processed, created only that label
This is a good alternative for me to use to get only one item to ship, but it would be nice if the split shipment feature inside the order details worked properly.