Corrected entry: When Greg calls Jennifer, he only dials 4 digits. (00:22:50)
Corrected entry: Jan introduces her school friend to Carol, Cindy and Bobby. Carol greets her with "Hi, Kerry, welcome to the neighborhood". Carol was not told that Kerry was new to the neighborhood. (00:01:55)
Correction: Carol may not have been told on-screen, but it's likely that she had heard that a new family was moving in and that they had a daughter named Kerry.
Correction: This isn't really a mistake. When I was growing up in the 70's, if you called someone who had the same prefix as you (prefix meaning the first three numbers of a 7-digit phone number), you only had to dial the last four numbers of their phone number.