Hi Devon,
It sounds like you will have to create a selection formula to choose only the records you want in your report.
What you first have to determine is which records you want (all records with backorder quantity not zero, for example). You would then enter this into the selection formula under the Print/Export menu:
eg. Qty Backordered <> 0
For specifics on how to enter selection criteria, the manual does have good information.
While you are determining the correct info, if you don't already, make sure that your detail section is not hidden. Also, have any fields you reference in the selection formula at least temporarily inserted in the detail section so you can see if your selection syntax is correct and selecting what you want.