After Duffy's "injury" while he is lying on a bed, Phil and the rest of the cast bring Duffy's "magic collar" to him. Phil is wearing a plaid shirt with short, plaid sleeves. In the shot where Phil is putting Duffy's collar on him, his shirt sleeve is that of a decorative Hawaiian shirt, but in the very next shot, Phil is wearing his original plaid shirt.
When Phil meets Susan for the first time, she offers him a glass of water. The glass is 1/4 full when she hands it to him, and sufficiently filled when he takes it from her.
The item Phil and Chris use to "scan" clothing is, in fact, a book light.
Susan reaches into an oven that just finished baking the cheese puffs with her bare hands and takes the pan out and doesn't burn herself. Then, minutes later, Phil takes the pan out of her hands and it burns him.
When Duffy first meets Susan, one can clearly see the red laser "dancing" on her pair of shoes which are lying just outside of her home.
Many times, you can see cat food placed where Duffy sits. This was intentional by the crew to have the cat who played Duffy sit there.
The boom mic shadow is visible when Tina says, "Hey, loser!", to her brother.
The boom mic can be seen above Phil's head as Susan confronts Tina and Trent in the entrance to Phil and Chris's house.
Tina reads a webpage that says Phil sold his company to something called GlobeTech, but further down the same webpage, it says the company's name is "Globel Tech" - now two words, with the word "global" misspelled.