Lost Weekend - S5-E2
Continuity mistake: At the end of the episode, the airport staff member (visible in the background) announces that the final boarding for Dawson's flight is at gate C-3. As the scene ends, the camera pulls away to reveal the gate number to be B-1.
Continuity mistake: When Dawson's parents are outside talking, sitting on the picnic table, Gail reaches over and kisses Mitch. She then slides her right arm back down to rest on her lap, and her hand on his lower arm. But the very next shot, Gail's right hand is suddenly holding Mitch's arm, up by his shoulder. She hasn't moved between shots.
Continuity mistake: In the intro to this episode, the camera is panning the family photos of Dawson and his family. There is a close-up of a photo of Dawson and his parents, and Gail has the really long 'big' hair she only wore in Season 1. At this time, Dawson looked much younger and had longish hair himself. But in the photo-Dawson has much shorter hair and looks older as in current time. Apparently the photos were put together just for this episode.
High Anxiety - S5-E6
Continuity mistake: When Charlie's two girlfriends play along in his dorm room, their positions change back and forth from close together to about a foot apart between shots. (00:24:30 - 00:25:00)
High Anxiety - S5-E6
Continuity mistake: When Joey is talking to Pacey at the boat party, she turns to face him. At this point, her hair is behind her shoulder on the left but the wind blows it in front of her right shoulder. Her hair is in front of her right shoulder during this entire shot. But in the next shot, she is suddenly facing Pacey square on to the camera, and her hair is now back behind both shoulders. The transition is almost instantaneous, so it isn't realistic that her hair would suddenly move from in front of her right shoulder to behind it that quickly without her touching it. (00:28:05)
Continuity mistake: Pacy is having supper at a restaurant, and he pulls off his lobster bib. As the shot changes to over his shoulder, the bib is still present. Next shot of his front, the bib is gone. (00:16:30)
Continuity mistake: During the 'Urban Legend' that Pacey is telling everyone, he and his co-worker are being chased by an evil car. Right after they leave the creepy Diner, they come upon the enemy car facing them parked across the highway. Pacey slams to a stop, and they are facing the car head-on in very close proximity, right in front of them. But the next shot shows that same car much further away, down the road and Pacey hasn't moved yet.
Sleeping Arrangements - S5-E12
Continuity mistake: When Joey is talking to Elliot in the classroom, she bends over her desk and gathers all her hair in front of her left shoulder. But in the next shot of her, you can see that her hair is suddenly in front of both shoulders. The transition was too quick to be realistic. (00:06:45)
Continuity mistake: In the beginning of this episode, we see Jen and Dawson going into the kitchen where Jen gives him his "back to school' gifts for Film School. As Jen slides across the front of the kitchen counter in her pajamas, her back is to us and she bends slightly forward. Right at this point you can see a real tattoo on the lower back of Michelle Williams, the Actress. This view lasts for a few seconds as she moves into position at the counter. This same tattoo was air-brushed out from a previous episode. During Season 4 Episode 22 "The Graduate" (00-08-49 run time); there is a scene where Jen is wearing pajamas and bending over with her back to us, helping Drue Valentine through her bedroom window. At this point her lower back tattoo was showing, and the Executive Producer mentioned that they had to airbrush it out as they felt it wasn't appropriate for her character Jen. I guess in this Season 5 episode in the kitchen; they either didn't notice her tattoo showing, or chose to ignore it. But it is visible if you watch closely. (00:00:20)
Downtown Crossing (2) - S5-E15
Continuity mistake: When Joey is talking to the Mugger in the hospital room, every time they show her sitting down in her chair or getting up from it the chair looks like it is quite far from the bed, down past the foot of the bed, about 10 feet or so from the guy. But all the other shots she appears to be sitting much closer, only a few feet away from his face. (00:31:35 - 00:38:05)
Downtown Crossing (2) - S5-E15
Continuity mistake: While Joey is talking to the Mugger in the hospital room, her hair frequently changes very suddenly between shots from being tucked behind her ears to hanging in front of them. This goes on during the entire scene; and towards the end as the Mugger dies her hair goes from being in front of her ears, to next shot of her hair being tucked behind her ears but not crying, to next shot of her hair being behind ears, pushed back off the forehead and she is openly crying with tears streaming down from both eyes. The changes are too sudden to be realistic, and at this point her hands are in her lap wrapped in her jacket. (00:34:25 - 00:37:30)
Downtown Crossing (2) - S5-E15
Continuity mistake: The level of ash, and the length of the mugger's cigarette change constantly between shots.
Continuity mistake: When Pacey is handing Audrey the cupcake in the motel room, he places a small candle on it first. When he puts the candle on the cupcake, it's noticably crooked. But in the next shot showing the cupcake, the candle suddenly appears much straighter. (00:37:55)
100 Light Years From Home - S5-E19
Continuity mistake: At the end of the episode, Joey and Charlie are talking in the pup tent in the living room in the morning. As Charlie says, "I must have lost my touch." Joey is facing him with her hair hanging in front of her left ear and down around her face. But the next shot of Joey as she says "I don't think so"; suddenly her hair is tucked behind her left ear and away from her face. There was no movement of her hand to touch her hair in between shots.
Answer: It's only explained once in the series. Jack says to Andie "I tried to start kindergarten without you", meaning Andie was smart enough to start school early.