Mistake in South Park

There are one mistake I have nodest in South Park. (But I'm only at season one episode 5) When Stan's sister throws him out of the window, it gets broken. When his friends are talking to him, they zoom into the face. When they pull the camera back again, the window is fix. When they take the camera on the sister who stands in the window and yelling, it's broken AGAIN. 


I'll tell you more, if I find anything.