Other mistake: In the episode "It's About Time!", near the end of the episode after they get back, when the camera zooms in on Phineas and Isabella, Isabella's face is gone - only her eyes remain, but after the camera zooms out her face is back.
Other mistake: The small door Candace enters at the beginning leads to the living room when really, it should be the kitchen. This error was not fixed in "Rollercoaster: The Musical."
Candace Disconnected/Magic Carpet Ride - S3-E5
Other mistake: During the Magic Carpet Ride episode, we see Candace and Stacy inside the Better Panda Chinese Restaurant. During the shot with Candace and Stacy at the table, the old man's eyes merge together.
Operation Crumb Cake/Mandace - S4-E21
Other mistake: When the reverse-inator zaps Phineas, and he takes apart the sculpture, it is impossible that he took down the whole thing alone, because he didn't build it alone.
Answer: And Bart Simpson should be about 40 by now. Cartoon characters don't age in real time. And are you really counting summer vacation days in a show about children who build spaceships and a platypus who's a secret agent?
Brian Katcher