When Doug told a joke to Holly while eating breakfast, she laughed in response and spit her cereal on his shirt. In the next shot, the shirt is now suddenly completely dry.
When Doug asks Holly about the Diet Dr. Pepper situation, his fingers are pointing straight out. It then cuts to a different angle, and his fingers are now folded back.
Doug tells Carrie that the paperboy threw the paper into the sprinklers, but they don't have sprinklers and a very tiny lawn.