After the scene in the lobby when Marta arrives, Lewbert pulls Carly into his office and the large round clock by the door reads 4:24. When Sam enters the clock still reads 4:24. As Carly tells Sam that Lewbert is in the corner rocking the clock has suddenly advanced to 4:29. Right after Lewbert says "Have you ever noticed this wart?" the clock has moved back to 4:24. After Lewbert says "It sprouted right after that devil came into my life" the clock is back to 4:29.
There are several scenes filmed in the lobby of Bushwell Plaza when people walk in or out of the front door (first Carly and Sam, then Marta, then the police officers) - in the view looking out the front doors there is a planter box full of plants in front of the door that obscures the view of the street, whereas in exterior shots of the building there is no planter box, and the front door is clearly visible from the street.
When Carly, Sam, and Freddie are in the kitchen, Sam is not wearing anything on her head. When Sam picks up Freddie (to forcibly accompany her to Lewbert's apartment to retrieve her cellphone), the shot where Spencer enters the apartment has Sam wearing a striped hat. In the next shot showing her walking out the door, it disappears. Response: It is not a striped hat. It is Freddie's shoulder and he wearing a striped shirt.
Despite taking place in Seattle, a brief clip between scenes contains a Los Angeles County Metropolitan Transportation Authority bus running in front of Bushwell Plaza.
The Fig Nooter guy said he was going down to the parking garage, yet he was walking away from the elevator that leads to the parking garage.