The Orders namespace has Entities and Operations used for orders and other related Entities such as DeliveryNotes and Invoices. This namespace has nothing to do with the Checkout process where orders are created, but is more related to order history shown on pages like MyPage and such. The Order history is mostly a snapshot view of the orders as they looked when they got created in Norce, unless process integrations exists where DeliveryNotes and Invoices are passed to Norce.