Continuity mistake: In the first basketball game, after he falls and is then helped up, Scott's fringe keeps changing position. (00:02:50)
Continuity mistake: During the first basketball game, the spectator bench which the mascot is sitting on keeps changing. (00:03:40)
Revealing mistake: When Stiles enters the locker room, a guy walks out the shower and you can see his black underwear. (00:05:25)
Visible crew/equipment: Dolly tracks are reflected in all the shop windows as Scott and Boof walk and talk down the street. (00:09:00)
Continuity mistake: When Scott walks onto the stage with the paint cans, the red and white fabric jumps off / on his shoulder. (00:12:30)
Continuity mistake: When Scott asks if Pamela wants a ride to the party, the position and way she holds her script changes. (00:13:15)
Audio problem: As Scott waits by the liquor store counter, as the woman being served speaks, her mouth is out of sync. (00:17:25)
Visible crew/equipment: Stiles is surfing on the top of the van for the first time. The camera cuts to the back of the van, and a police motorcycle can be seen with its hazards on. (00:21:50)
Audio problem: When Scott says "On top of everything else, there was a full moon last night" his mouth is out of sync. (00:32:15)
Continuity mistake: When Scott is putting his books in his locker and is talking to Boof, he closes his locker. Then in the next shot, his locker is open. (00:34:30)
Revealing mistake: When Stiles opens up his locker there are a pack of cards that have been spread out to give the effect of falling out of the locker as he opens but they are already hanging at first and then they fall with everything else. (00:35:15)
Continuity mistake: When Scott is running to the toilet, his wolf fingernails are present, then disappear for a shot, then reappear. (00:36:20)
Continuity mistake: There is a scene where Scott and Stiles are talking in the garage. Stiles is standing in two different locations in the garage throughout the scene. (00:38:25)
Continuity mistake: During the basketball game, when Scott turns into a wolf, the Beaver's score decreases from 75 to 62. (00:47:35)
Factual error: There are no palm trees in Nebraska, visible when Wolf Scott surfs the Wolfmobile. (00:59:45)
Visible crew/equipment: When the wolf is "surfing" on top of his van, he does a hand stand, and you can see the handles he's holding onto for balance. They aren't there when they are surfing standing up. (01:00:15)
Revealing mistake: You see Scott walking towards the shower and he says hi to Chubby while passing him, but if you look closely after that you can tell Scott's only wearing a mask and his shoulder is bare skin. (01:00:15)
Visible crew/equipment: Michael J. Fox is dancing on top of a bus as the Teen Wolf. The camera swings just a little too far toward the back of the bus and a police car that is escorting the camera car and bus is seen in the rear with its red lights going.
Other mistake: When Scott is delivering the hardware store supplies for the play, the cans of paint he is carrying awkwardly flip about like empty ones, and when he drops it makes a hollow sound. I'm sure they are meant to be full.
Continuity mistake: When Scott turns into the wolf for the first time in his bathroom, the position of his blue coat on the toilet seat keeps changing.
Answer: Because Lewis knew that Scott wasn't being true to himself by letting the Wolf take over his personality. Lewis, like Boof, liked Scott for who he was as a person, not as a werewolf.