Thanks Steven. I’ve decided that the simplest way is to duplicate single individuals as families so that they show up in both listings. I could import both lists from an Access database so the only extra work was switching one of two entries to family’ type and linking it to the other as individual family member.
I just answered my own question. On the Family entry/edit page there are handles for each family member that allow you to drag them around into position. It’s easiest to drag to the bottom – second position to bottom, then third and on down.