The issue may still be related to the Document type. Though you can delete an Order, a printed Invoice or Credit note is only cleared from the Details file when Dayend Processing is done.

Most of the time, you only want to report on Orders or on Invoices and Credit notes.

To isolate Completed Orders, you can create a selection formula based on the Document status field. It is at the bottom of the Header section: Order complete (Y/N). If you want to isolate Completed details on an Order, you also have a status field in the Details section: Completed (Y/N).