The Kids Are Alright (1) - S6-E1
Continuity mistake: At the beginning of the episode, Joey is shown refunding her Paris ticket. The shot is from Season 5 Finale, and her hair is tucked back behind both ears and darker. The next shot of her, the hair is suddenly much lighter, wavier and hanging in front of her ears. Obviously this was shot in Season 6. (00:00:10)
The Kids Are Alright (1) - S6-E1
Continuity mistake: During the beginning intro monologue, Jen is shown seated between her parents on a couch. The two actors portraying her parents are only shown from the back, but they appear to be different people than the original actors who portrayed them. The father, especially has different hair and wears glasses. (00:01:40)
The Kids Are Alright (1) - S6-E1
Continuity mistake: At the very end, Dawson and Joey are kissing and they lay back on her bed. The snowglobe Dawson has just given her sits on the table next to her bed, and suddenly the snow inside it is drifting vertically down as if someone has just shaken it. But Joey and Dawson are busy, and neither one has touched it. Only a strong shaking could produce that type of snowfall, not just something bumping the table. (00:43:05)
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.