Continuity mistake: Sometimes Ed's fireplace in his office is on the right wall but then other times it's on the left. Plus Ed and Mikes' offices switch sides mid series. Ed's office is stage right in early years, Mike's is stage right in later years.
Putting a Hit on Christmas - S2-E7
Continuity mistake: The Christmas package in front of Kyle is fully but badly wrapped. When Eve turns back with new Christmas wrapping to re-wrap the package, it is fully unwrapped with not enough time for Kyle to remove the old wrapping.
Where There's Smoke, There's Ire - S6-E3
Continuity mistake: After Vanessa is finished smoking and tries to cover up the smell, she stuffs a dryer sheet down her blouse when Mike walks in. The amount of the dryer sheet sticking out changes throughout the scene.
Continuity mistake: The fork on Mandy's breakfast plate keeps changing positions as the shots change.
Other mistake: When there is an establishing shot of Outdoor man there is a California state flag on the roof. The show takes place in Colorado.
Other mistake: The score board says Huskies 16, Visitors 14, with 16 seconds left on the football game. But the story is that Eve, who is the kicker for the Huskies, kicks the winning field goal. The Huskies are already winning. (00:10:00)
Continuity mistake: In the beginning, when Mike is talking about the rubber bands around lobster claw, he takes his hands off the counter to mime the claw and Vanessa is touching him. In the next shot his hands are immediately on the counter.
Continuity mistake: Ryan puts the salmon on the loading dock near the cat food, inside the warehouse, and leaves. When the bear walks out though, it's gone, platter and all.
The Passion of the Mandy - S1-E11
Continuity mistake: Vanessa takes 3 milk cartons out of the bag a green, blue, and red. Vanessa leaves the green one on the counter. The shot changes the red one is now on the counter Eve takes it to the table where it changes to green.
Deliberate mistake: When Tim Taylor is telling Mike about his show "Tool Time," he mentions that it lasted for 8 years. Later in the episode when Mike is asking Tim why he stopped doing the show, Tim says it's because he found it challenging to keep the show great and not run out of ideas. Firstly, while Home Improvement ran for 8 years, the show within the show of "Tool Time" was already a couple years old when Home Improvement started, as evidenced by the fact that its season 3 episode "Fifth Anniversary" was about "Tool Time" celebrating its 5th anniversary, as the title suggests. Additionally, Tim didn't quit "Tool Time" for the reasons he stated here. He spontaneously quit over creative differences with Binford's new president, who was turning the show into a sensationalist Jerry Springer type of format, and because his wife Jill had just been given a job in Indiana, and he decided the family would move there to support her.
Continuity mistake: When Mike and Mandy go into the run down sub shop, Mike is starting to close the door. In the next shot of Mandy, we see the door is closed. But after that, the door is wide open.
Continuity mistake: The amount and position of the food on Vanessa's plate changes from more to less to more several times as she eats while conversing with Mike.
Other mistake: Mike Baxter's green pickup truck is shown parked at Outdoor Man, yet in this episode he and his truck were home, waiting with Chuck and Ryan for Boyd to come home from school.
Other mistake: Ed is telling Mike he is taking over the website. Ed says, "We have to lure young men to our stuff." Mike replies, "That sounds like something my sisters would say!" As we find out in later episodes, Mike has no sisters. (00:05:00 - 00:06:10)
Continuity mistake: The sandwich Mike makes changes after he cuts it, you can tell the lettuce is different. And in the last shot, the sandwich flips in his hand; he was holding it so the lettuce was on the bottom and in the last shot it's on top.
Character mistake: When Ryan is recreating the chess game he and Mandy played, he has the chessboard setup incorrectly. He has the dark square on the lower right corner when it should be the white square. He was a junior grand master and would know better, especially since he had the board set up correctly when they were playing.
Character mistake: Mike is holding and talking about his .59 caliber flintlock and refers to placing a percussion cap on it to fire it. A flintlock does not use a percussion cap.
Factual error: During the switching of scenes, when visiting where Mike 1st began, it shows a marathon gas station in the background. There are no marathon gas stations West of the Mississippi river.
Continuity mistake: When the guys are around the table talking about the car, Mike is holding the pictures. It cuts to his hands being empty and then back to him holding the picture and back to being empty.
Last Halloween Standing - S1-E4
Continuity mistake: When Mike is in Ed's office he is sitting in a chair he has a remote in his hand. His hand is up by his ear the shot changes, his hand is now in front of him. The remote is in his left-hand then switches to his right. When he leaves it is back in his left.