Same Job won't pick costs on certain shipments, but it does on others shipments

Here is the timeline of our problem explained with one of our Jobs 001821-21-2 / assembly 014630-A as an example: The material was issued on 1-6-17 (with cost), Job completion check box was marked on 1-9-17, shipments of 20 and 8 were done on 1-30-17, and both picked up cost. Shipment of 9 done on 1-31-17 also picked up cost. Shipments of 25 on 2-2-17 and 17 on 2-3-17 DID NOT pick up cost, same job, same sales order, and all shipments made from job-to-customer?? See attached screenshot.

Any suggestion will be appreciated!