Why do the surname and index pages indicate there are more families than are actually in my GEDCOM file?
Your GEDCOM file contains individuals who are not associated with any families. Since these individuals do not appear as children or as spouses on any family page, GED-GEN creates a family page for them. The only way to navigate to one of these “extra” family pages is via the individual’s name on the index page.
This situation may occur when you use your favorite genealogy program and do not enter a spouse or children for an individual. It may also occur if you restrict which individuals are exported to the GEDCOM file. Suppose you have entered an individual and their spouse to form a family, and only the spouse is living. When you later export only deceased individuals to a GEDCOM file, the spouse is not included. In this case the exported individual is not associated with any family.