Continuity mistake: When Jimmy Dave and Joe are in the break room Jimmy stands up, the shot changes he is sitting down, the shot changes again he is standing up. (00:05:40)
The Trainer - S3-E11
Continuity mistake: When Lisa walks into Dave's office and says "You Canadian?" One of Dave's hands is at his ear, the shot changes and his hand is now at his side.
Continuity mistake: Jimmy is talking to Beth about stocks. Bill is seen opening the door to the booth, the shot changes and he is already in the booth. (00:13:30)
Continuity mistake: When Dave and Bill are in Dave's office, the coffee mug on Dave's desk changes position.
Continuity mistake: When Dave and Beth are in Dave's office talking about what happened between him and Lisa, there is a coffee mug on Dave's desk. The handle is pointed at the camera. When Dave picks up the mug, the handle is now pointing away from the camera. It changes positions other times too.
Continuity mistake: The box Ed pushes off the elevator lands in front of Dave. When Dave picks up the box it has moved.