Shipment Handling Unit missing data?

We are in Apps 10 UPD 10 working to implement SSCC, Shipment and Handling Unit labels.  

1. After clicking Create SSCC when clicked on the shipment, I do not see an SSCC number for the entire shipment. I have the appropriate checkboxes checked in the Handling Unit rows and do see an SSCC has been generated for each of the 4 pallets

   

    

2. When I am clicked on the Shipment line in the Handling Unit Structure,  and click  ‘Print Shipment Handling Unit Labels’, No of Handling Units = 0 when in fact there are 4 pallet Handling Units in the Shipment

3. The report  only contains information for the last of the 4 pallets, not all 4, which I would expect for a Shipment Handling Unit. 

Am I misunderstanding and what am I missing to make this work? 

Thanks