Ok, so I was watching the marathon and noticed something....

In a newer ep, Margaret begins to learn how to drive (and gets into an argument with Jim), and the kids are older....But I remember in an older ep, her driving down to Jim's office (when he thought he wanted to buy a farm and move the family) and she left her one glove in the file tray...She drove back home cuz we saw her get out of the car..But when he was explaining to Kathy what would happen when they would move, she was still a little kid, so how did the continuity get lost?