Oh boy - that certainly explains it, but this is NOT a good thing!!!! Here is what I did that probably caused it:
My GEDCOM file included Margaret Udell, whose profile I changed to make her the sister of Michael Udell, who I had previously entered.
In addition, Michael's 3 children - Florence Udell, Matthew Udell, and Estelle Udell were also in my GEDCOM file and I changed their profiles to make them siblings. I also changed their profiles to add their mother, Helen (Deitel) Udell because I had entered her here previously. Of course, I also added their father and the marriage between their parents. I'm not sure what order I did all that in, but from your explanation, if I made them siblings before giving them parents, that's probably what happened.
Does this point to a need for any instructions to people about the order in which they should edit relationships? ... and can you possibly make all those superfluous Unknown Father profiles go away????
THANX a million!