A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Missy calls Mary "Cave-mum," she has both hands up in front of her. However, when the shot changes, one hand is lowered. (00:01:15)
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When we see Sheldon in bed at the start he's either flat on his back or on his side depending on the shot. (00:03:45)
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Sheldon and Missy lie in bed together, her right hand is on top of her left. A shot later, it's the opposite way. (00:09:16)
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Georgie meets Sheldon by the school lockers, he grabs his lunch bag from inside. From the opposite angle, he's taking it out again.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When Mary lies in bed with Meemaw, the way Mary's right arm and hand lie on top of the left arm differs between shots. Check the way the hand covers the sleeve, for example.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: During the spaghetti meal scene, the way Missy holds her fork changes between the back and front shots, especially during the last shots.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: Sheldon pinches a loaf of bread, but a shot later he's pinching spaghetti. This changes back and forth a couple of times.
A Computer, a Plastic Pony, and a Case of Beer - S1-E12
Continuity mistake: When the family leaves the computer store, Missy's candy sucker swaps randomly between being in her mouth or not between one frame and the other.
A Sneeze, Detention, and Sissy Spacek - S1-E13
Continuity mistake: When the principal gets the paddle out of the drawer, he holds it in two hands. But as he goes to sit down, he is only holding it in one hand. (00:02:30)
A Sneeze, Detention, and Sissy Spacek - S1-E13
Continuity mistake: When Mary opens the beer towards the end, she throws the bottle cap on the table, and it lands next to an orange item. When the shot changes, the cap has moved further away from the orange item. (00:16:30)
A Sneeze, Detention, and Sissy Spacek - S1-E13
Continuity mistake: When Connie is talking to Mary about getting Sheldon out of the garage, Mary's beer is either on the table or in her hands depending on the shot. (00:16:50)
Dolomite, Apple Slices, and a Mystery Woman - S1-E15
Continuity mistake: When talking with Tam in the library, the way Sheldon holds his floppy disk keeps changing. Note his hand in relation to the hole in the middle. (00:00:50)
Dolomite, Apple Slices, and a Mystery Woman - S1-E15
Continuity mistake: When Sheldon is talking to the girl in the library, her left arm is constantly changing position depending on the camera angle. (00:01:30)
Dolomite, Apple Slices, and a Mystery Woman - S1-E15
Continuity mistake: When Sheldon is doing laundry, the two items in/on the adjacent machine to the one he is throwing clothes in, keeps changing position between all the cuts of Sheldon. (00:13:10)
Killer Asteroids, Oklahoma, and a Frizzy Hair Machine - S1-E16
Continuity mistake: When Sheldon grabs the school intercom, the principal has a piece of paper folded up out of the folder in his lap. When the shot changes, this piece of paper has disappeared as it should be visible in both shots. (00:04:00)
Killer Asteroids, Oklahoma, and a Frizzy Hair Machine - S1-E16
Continuity mistake: At dinner, Missy says her day was fine until she learnt they can't afford cable. When she does, she has her fork over her green side bowl. When the shot changes, her fork is now over her main plate. (00:05:10)
Jiu-Jitsu, Bubble Wrap, and Yoo-Hoo - S1-E17
Continuity mistake: When Sheldon is wrapping bubble wrap around his torso, it goes from neat to messy between long and close shots. (00:04:50)
Jiu-Jitsu, Bubble Wrap, and Yoo-Hoo - S1-E17
Continuity mistake: When Mary arrives at the bowling alley and is talking to Brenda, Brenda's hands are constantly changing between instant cuts. In some shots she's holding shoe freshener and in others it's shoes. (00:13:15)
A Mother, a Child, and a Blue Man's Backside - S1-E18
Continuity mistake: When the guidance councillor holds up the leaflet for Caltec, where she holds it changes between front and rear camera angles. Note the distance from the top of the leaflet. (00:09:10)
A Mother, a Child, and a Blue Man's Backside - S1-E18
Continuity mistake: When Sheldon is shown the M.I.T leaflet, the way it's displayed to him changes between shots. (00:09:20)
Answer: Some people just have a dislike for someone that can't be explained. Could be as simple as the way he's dressed.