Continuity mistake: When Carrie is startled by the squirrel and tosses the pie crust onto the counter, the camera cuts to her clasping her legs where she burnt them. In the next shot of the counter the pie crust has vanished; then in the next shot of it, the crust has returned. Also, the tray and tea towels change positions.
Continuity mistake: At the bar "Trade" Charlotte is having tape on her upper body in one shot, but it disappears a second later when she sees Anthony. She has no time to take it off. (00:03:45)
Continuity mistake: In the restaurant with Big and Carrie, Big's either holding the stem of his wine glass, or holding it above the stem between shots. There isn't any time for him to switch the position of his hand between shots.
Ghost town - S4-E5
Continuity mistake: Carrie, Samantha and Miranda are at the opening of Steve and Aidan's bar. Carrie lifts her hair off her neck with her right arm, but then in the next shot, she is lowering her left arm.
Coulda, woulda, shoulda - S4-E11
Continuity mistake: Carrie is sitting at her laptop eating a blue ice pop. She takes a bite from the top then holds the stick with the rest of the ice pop in between her teeth while she types on the laptop, we see a shot of the screen. When we go back to Carrie she is eating the rest of the ice pop which is impossible because just 2 seconds before it was still attached to the stick. She didn't have time to bite it off the stick because she was using both her hands to type.
Continuity mistake: When Carrie and the Vogue editor are drinking martinis in his office, the level of liquor in their glasses changes from shot to shot.
The agony and the 'ex'tasy - S4-E1
Continuity mistake: When Carrie is showering after being stood up at her party she is not wearing mascara as she stands with her face under the water, then as she opens the curtain to talk to Charlotte again there is no mascara. She puts her hands briefly over her eyes and when she takes them away, mascara is visible all over her eyes and cheeks.
Continuity mistake: When Carrie is reading the magazine and Aiden punches a hole through her wall, the hole looks to be about 4 feet from the corner of the wall. But after Carrie gets up and runs into the other apartment to confront Aiden, the hole in the other side of the wall is suddenly about 8 feet from the same corner, much further away. (00:12:55)
The real me - S4-E2
Continuity mistake: As the group are discussing Samantha's nude photos in the restaurant, a salad Miranda has ordered arrives at the table. Just after Carrie says "that we know of" you can see the waitress place both the salad and a ramekin of dressing onto the table from behind Miranda. The shot then cuts to the front and the waitress is shown putting the ramekin down for the second time.
The agony and the 'ex'tasy - S4-E1
Continuity mistake: When Miranda bumps into Cheryl on the street, she holds out her arm and starts shaking it like she is shaking Cheryl's hand but when the shot changes to Cheryl, she hasn't even taken Miranda's hand yet.
Continuity mistake: When Carrie is holding the pie pan, she is startled by the squirrel on the window and drops the hot pan, burning her legs. She is facing forward directly towards the pie pan, and as it falls it could only have burned the front and possibly a little of the sides of her legs. But later when she is sitting on the kitchen table, Aiden takes some ice from the iced tea pitcher and puts it in both of his hands. He then asks her where she was burned, and proceeds to gently rub the ice on the back of both of her legs, not the front or sides where she was burned. He is only rubbing the back of her calves, below the knees. (00:25:00 - 00:25:45)
What's sex got to do with it? - S4-E4
Continuity mistake: After Carrie asks Ray if he wants to 'play her', she pulls down the neckline of her top to reveal a strap on her left shoulder. But in the next shot when Ray moves behind Carrie and we are facing them, suddenly her top is pulled back up, and there is no strap showing. This was a seamless transition, and there was no time for anyone to have pulled her top back up. (00:19:05)
Continuity mistake: When Charlotte is crying into the pillow, we can see that she's gotten black eye make-up on it. The splodges of make-up disappear twice during the scene, most noticeable just when Carrie walks in holding the baby.
Continuity mistake: When Carrie climbs into Big's car, she puts her bags in first, in between her and him. When the shot changes, a split second later her bags are suddenly tucked down by her legs on her other side. (00:15:15)
I heart ny - S4-E18
Continuity mistake: When Carrie walks into Miranda's delivery room, we see a shot of her from the back, and she's stopped walking, but then the very next second we see her walking into the room again.
Continuity mistake: When Carrie visits Charlotte she says "and for the record" and raises her right hand towards her forehead. From the opposite angle it's lowered.
Continuity mistake: When Aidan and Steve argue about who's going to the toilet, Steve leans forward, but from the angle shot from behind his back is against the seat.
Continuity mistake: When Aidan says he's going to the toilet, Miranda's drink is on the table, but a shot later she is drinking. Then she lowers her hand but from the opposite angle she already has it lowered.
Continuity mistake: While having dinner with Steve and Aidan, the latter has his hand next to Steve's neck, but it disappears in the angle shot from behind.
Continuity mistake: While eating, Sam says "wait for the signal" and grabs the cutlery. A shot later her arms are lowered behind the table.
Answer: I'm a long-time fan of the show, having re-watched it many times, and I definitely remember slightly different dialogue at the end of that episode than what's on my DVD. I'm afraid I have no idea why this change might have been made or any other info, but you're not insane.
Purple_Girl