I was just watching the episode of the jeffersons where Jennies Brother Alan Willis came home after 2 years. during an issue in the Jeffersons apartment Louise said " just what my father said when i married you" to George. However, in later seasons Louise hasent seen her dad since she was 2 years old. What do you think about that? i think they made an error saying that

I notice that too. Maybe she had a step-father, and she just replace him as her biological father.