Lovelines (aka The Eddie) - S6-E19
Audio problem: When Jen is hosting the LoveLines event, she tells CJ that he is supposed to field the calls and not ask questions. But she appears to fumble her dialogue, and actually says, "You field, they ask, field, ask, field, ask," etc. She inadvertently gets it backwards, because in reality the question would come first and then CJ would field the question to the rest of the show. (00:14:05)
Answer: It's only explained once in the series. Jack says to Andie "I tried to start kindergarten without you", meaning Andie was smart enough to start school early.