Continuity mistake: When Diane finds out that Gino is not Sam's son, the towel that is on Coach's shoulder keeps changing position. In one shot it disappears then when the camera is facing him half is in font and half in back. When the camera is to his back most of the towel is in the back.
Continuity mistake: When Norm tells Dave he is the best sports reporter in town Dave is holding sunglasses and a paper. The shot changes and he is now only holding the paper.
Continuity mistake: When they are talking about Ed coming to the bar. Coach is drying a glass, the shot changes and he is no longer holding the glass.
Sam's Women - S1-E2
Continuity mistake: When Carla is explaining to Norm why there are drawbacks to dating beautiful women, the amount of beer in Norm's glass changes a couple of times.
Continuity mistake: When Woody is showing Sam what he bought at the drug store a mask appears on the bar, but Woody was not shown taking it out of the bag. (00:01:00)
Continuity mistake: When Cliff walks into the bar and walks over to Norm his beer is almost gone - the shot changes and it's full. (00:17:25)
Continuity mistake: After Frasier leaves to be bad, Norm starts talking. He puts his hands on the bar, the shot changes and he now has one hand on his glass of beer. (00:16:55)
Adventures in Housesitting - S7-E11
Continuity mistake: When Mr. Sheridan comes to talk to Rebecca there is a pencil on the bar, when he goes to leave it has disappeared. (00:04:45)
Adventures in Housesitting - S7-E11
Continuity mistake: Sam pours Frasier his coffee - he starts to hand it to him, the shot changes, and Frasier is instantly drinking it. (00:02:50)
Continuity mistake: When Carla hands the drinks to the costumer to bring to table six there are 3 drinks - 2 brown and 1 clear. The shot changes and now it's 1 brown and 2 clear. (00:07:10)
Continuity mistake: At the beginning of the episode after Rebecca goes into the office, Woody walks over behind the bar and starts to talk to Sam. Carla has her hand by her mouth - the shot changes and she doesn't. (00:02:50)
Continuity mistake: When Frasier and Diane are telling Sam they are moving in together, there is a napkin in front of Frasier that suddenly moves when Sam says "Really that was one of my highlights."
Continuity mistake: When Carla says "This will be great - Nick's a bleeder" they are standing next to each other without touching. The shot changes and they each have one arm around the other.
Continuity mistake: When Carla is saying what happened at the wedding, Norm is about to take a drink - the shot changes and he is already drinking. (00:14:25)
Continuity mistake: Diane is looking at the picture Carla gave her. The shot changes and Diane is now looking straight ahead as she gives Carla the picture. (00:08:25)
Old Flames - S2-E7
Continuity mistake: When Diane walks in and asks where Sam is, there is a box on the bar. When she walks up to the bar the box has changed, then later changes back.
Old Flames - S2-E7
Continuity mistake: In the opening scene when Norm is talking and he says "we caught a little movie this afternoon," he starts to take a drink from his beer, the shot cuts to behind him and he is still drinking. Then the shot changes - his mug is sitting in front of him, and he starts to take a drink. (00:00:40)
Get Your Kicks on Route 666 - S10-E2
Continuity mistake: When Frasier is sitting at the bar talking about the trip he is going to take, Cliff walks over and sits down. There is a beer sitting in front of him - he pushes it forward and Sam moves it. The shot changes and the beer is back where Cliff had first moved it, and he is holding his own beer. For the rest of the scene his beer keeps appearing and disappearing while the other one keeps changing position.
Continuity mistake: When Sam puts the paper from John on the bar it is next to a bowl, the next time we see it there is now more space between the bowl and the paper. Part of the paper is in the air, then the next shot when Sam picks up the paper it is lying flat on the bar.
Continuity mistake: When Claudia is saying goodbye to Sam she is holding her purse and a magazine, at first the purse is against her body, the shot changes and the magazine is.
Answer: They sometimes acquire episodes from syndicated reruns. The ones with the cut scenes. Sundance channel have some episodes of M.A.S.H. uncut.