Here's my solution to this problem. I create a child record for the couple. I name the child "Place Holder." I can even include some information in the Note of this record to explain what I'm doing. I select "Place Holder" as the starting person for my report and the problem is solved. After I generate the report I delete the record for "Place Holder." If I forget to delete the record I can always easily find any records for "Place Holder" by searching for that name or looking at the sorted name list in the RootsMagic display.
Dick Henthorn
29 August 2014