How Cory and Topanga Got Their Groove Back - S7-E18
Continuity mistake: When Eric sneezes on Jack's cereal, Jack is holding the carton of milk level with his abdomen. When the shot changes, he has already set the carton down on the counter. (00:04:30)
How Cory and Topanga Got Their Groove Back - S7-E18
Continuity mistake: When Eric is saying to Jack "It was you all along," he points his left-hand index finger at Jack, who is shown writing down the lottery numbers Eric provided him. When the shot changes, Eric is now pointing with his right hand, and Jack's hands are suddenly on his hips. (00:16:40)
She's Having My Baby Back Ribs - S7-E17
Continuity mistake: When Alan remarks that Amy never got her figure back after she gave birth to Eric, her arms are folded. When the shot changes, her arms are down at her sides. (00:10:10)
She's Having My Baby Back Ribs - S7-E17
Continuity mistake: After Cory says "You don't have to tell me that" after Shawn compliments his waffles, Shawn is shown holding the fork pointed down towards the waffles. When the shot changes, he is suddenly holding holding the fork perpendicular to his body. (00:04:35)
She's Having My Baby Back Ribs - S7-E17
Continuity mistake: When Jack, Rachel and Angela start heading to their class, a shot of Topanga shows her holding a slice of pizza slightly raised from her plate. When the shot changes, she is suddenly holding the pizza several inches above the plate. (00:01:04)
Seven the Hard Way (2) - S7-E16
Continuity mistake: When Topanga joins the group hug, the piece of paper that Eric wrote on is underneath her. When Cory joins in, the paper has disappeared. It then reappears when Mr. Feeny dismisses everyone. (00:20:10 - 00:20:45)
The War (1) - S7-E15
Continuity mistake: After Rachel sprays water all over Cory, the amount of wetness on his shirt varies throughout the scene. (00:05:53 - 00:09:05)
I'm Gonna Be Like You, Dad - S7-E14
Continuity mistake: When Topanga, Shawn and Angela are hanging out in Cory and Topanga's dorm anticipating Cory's return from the doctor, the slice of pizza that Angela is eating goes from having a small bite taken out of it, to being halfway gone, and back to having one bite taken out of it. (00:12:07 - 00:14:02)
Other mistake: At the beginning of the episode, Eric talks about how Alan's Navy background will cause him to use any means necessary including torture to find out about his birthday party. Cory chimes in and states that Alan was a cook in the Coast Guard. The plot of the Season 1 episode Kid Gloves concerned a necklace Alan gave Cory for his birthday, which Alan himself earned for placing second in his weight class for boxing in the entire Navy. So either Cory doesn't correctly remember his own father's military background, or the show needlessly retconned it. (00:00:43)
Continuity mistake: When the voice on the intercom is saying "Paging Dr. Chocolate Pudding," Cory's right hand is on Topanga's right arm, and her hands are in her lap. When the shot changes, both of his hands are suddenly resting on his stomach, and her right hand is suddenly resting on his left leg. (00:07:23)
Continuity mistake: When Shawn stands up on the chair to propose a toast, Eric is at his 9 o'clock. When shot changes, Shawn has instantly rotated his body so that Eric is now at his 6 o'clock. (00:16:47)
Revealing mistake: When Cory opens up the curtains of his bungalow to show Topanga the beach, you can tell the background is just a backdrop, as there are no waves approaching the shore. (00:10:36)
Revealing mistake: When Eric picks up Cory to show him the "For He's A Jolly Good Fellow" dance, Cory screams that Eric is going to knock over the candles, upon which one of the candles on the desk is knocked over and sets fire to the curtains. If you look closely, neither Eric or Cory bump any of the candles nor the desk they are on, the candle just tips over on its own, suggesting an off-screen crew member used wire or string to pull the candle down. (00:07:18)
Continuity mistake: When Morgan is telling Topanga that she wouldn't use her bridesmaid's dress to wipe her ass, she gets cut off by Alan who covers her mouth with his left hand and then begins dragging her out of the reception hall. When the shot changes, he is covering her mouth with his right hand. (00:17:22)
No Such Thing as a Sure Thing - S7-E4
Revealing mistake: When the family is eating dinner, throughout the scene you can see Jack dabbing his fork into his mashed potatoes and raising the fork to his mouth with little to no potatoes on it in order to give the illusion that he is eating. (00:03:57 - 00:05:05)
For Love and Apartments - S7-E2
Other mistake: When Cory is trying to get Topanga's parents to reconcile, Topanga's mother mentions to her ex-husband about the "beautiful child they've made." Given that she says "child" in the singular, this can only refer to Topanga. However, the season 1 episode She Loves Me, She Loves Me Not established that Topanga had an older sister named Nebula. So the mistake is that either the show is acting like a character that was firmly established never existed, or Topanga's mother doesn't realise she has at least two children. (00:15:32)
For Love and Apartments - S7-E2
Character mistake: When Shawn is scolding Topanga for getting angry with Cory for travelling to Pittsburgh to try to get her parents back together, he mentions that he travelled a hundred miles to do so. Philadelphia is roughly 300 miles from Pittsburgh. Travelling only 100 miles westward from Philadelphia would barely get them past Hershey. (00:17:53)
Can I Help to Cheer You? - S6-E18
Continuity mistake: When Tommy is saying to Eric "We've been hanging out with each other for a long time now," Eric's coffee mug is mere inches from his face. When the shot changes, the mug is almost set down on the table. (00:00:58)
Continuity mistake: When Morgan emerges from the kitchen after Topanga picked her up from school, a wall is visible behind the door leading to the kitchen, even though the kitchen itself should be visible. (00:02:18)
Audio problem: When the waitresses are performing their song, you can tell they are lip syncing to a recording even though they are supposed to be giving a live performance. The vocals have a noticeable amount of reverb and are mixed evenly with the instrumental track despite the fact they aren't even using microphones. (00:06:49 - 00:09:00)
Chosen answer: In the present day, with the United States abiding by more stricter school health laws, for the most part this wouldn't be in school cafeterias as many cannot even have carbonated beverage machines now. However, in the 90s when the show takes place, it wasn't unheard of for there to be coffee machines in the cafeteria of small schools where the teachers eat with the students as we see them do often in the show. The idea being that the cafeteria was small enough so a teacher or hall monitor could catch a student before they could drink the coffee.