I don't remember that. The TV station I worked for at the time carried the show, but it was pre-empted most of the time for sports. Of course I found some down time and grabbed the tape and watched it. The New WKRP hasn't had the rerun life the original had, of course.I thought he adopted a girl who turned out to have an identical twin sister.
What makes no sense is he raised the fun-loving one and the other one was raised by someone irresponsible and still turned out to be smart and serious.