Continuity mistake: When Doug and Carrie are in the living room talking about Doug not going out with Kelly again, he has the phone in his hand, gets upset and throws the phone down. Then Carrie is going to call Kelly for Doug, and when she goes to pick up the phone, it's placed perfectly back on the hook when it should be hanging near the floor from the way Doug threw it.
Continuity mistake: Near the end of the episode when Doug and Carrie are at Deacon and Kelly's apartment, you can see a picture on the wall in the hallway behind them. Then when Doug and Carrie leave, the wall is much further back and there's a window and plant instead of the picture on the wall.
Revealing mistake: In the kitchen, Deacon asks Doug, "Are we gunna play basketball or what?" while leaning against the counter. In this shot you can see the kitchen wall is on an angle slanting away from the camera. This makes the kitchen look bigger and cuts down on the empty stage space on the wall where the cameras are.
Plot hole: Spence comes in with a pizza and says, "Let's hit this pizza hard and get out of here." But then later we find out there's a laptop in the pizza box. What if the guys actually wanted a slice? Also, after the guys leave for the movies, Carrie or Arthur would've seen the laptop in the pizza box.
Continuity mistake: In the episode where Priority Plus is mentioned, after the Priority Plus driver has got Doug out of the drive through, he gives Doug a lift in his truck. In some shots there is a window on the side of the street. In the window there is no Priority Plus truck visible.