Continuity mistake: During breakfast, when Charlotte is telling about her boyfriend falling asleep and asks her friends to please help her, Carrie's arms position is inconsistent between the side and front shots: Up/down, arms crossed with left hand over right arm/ left hand vanished with right arm bare. (00:13:13 - 00:13:59)
Continuity mistake: When Miranda is making her bed she is holding the pillow cover with one or two hands depending on the shot.
Continuity mistake: When Carrie is ordering her breakfast Charlotte is looking at her, her right hand on her head. Her fingers are extended or not depending on the angle.
Continuity mistake: After the cute smoker-guy scene, Carrie is on Miranda's bed and her hands swap between crossed or not between shots.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: When Samantha is talking to Carrie on the beach, Carrie lifts her arm up and places her hand on her head. The reflection on Samantha's glasses show Carrie lowering her arm, but the shot changes back to Carrie and the movement she is doing is not downwards but backwards, leading hear hand to the nape.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: While talking to her protege, Carrie stubs out her cigarette twice, right before she runs into Big and Natasha.
Twenty-something girls vs. thirty-something women - S2-E17
Deliberate mistake: In the scene at the beach party, when Carrie brings everyone beers, Miranda says "There's so much foam, I could ski on the head," but the cups are tipped toward camera and you can see there's no foam at all.
Twenty-something girls vs. thirty-something women - S2-E17
Visible crew/equipment: A white screen and crew member holding a boom mic are reflected in Samantha's glasses when she is talking to Carrie on the beach.
Twenty-something girls vs. thirty-something women - S2-E17
Deliberate mistake: When the girls are on the beach, Carrie's narration says "It was a sunny day", but instead it is a grey and cloudy one. Surely the filming schedule was tight and they had to cope with that day's weather.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: At the party, when the doctor leaves, Laurel holds the drink with her left hand but a shot later it's on her right hand.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: Carrie and the doctor are dating for the day after and a waiter approaches on the left. A shot later he disappears.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: When Carrie meets the doctor there's a couch right behind them, plus a table next to him and another couch behind Carrie. A shot later they're surrounded by people despite the place being packed with stuff a second ago.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: When Carrie meets the doctor there's a waiter behind them who walks away towards Carrie's direction but suddenly disappears in the following shot.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: At the beach party, a fan meets Carrie who holds her beer with both hands or one depending on the angle.
Twenty-something girls vs. thirty-something women - S2-E17
Continuity mistake: When Samantha meets the doctor at the beach her legs are crossed or not depending on the angle.
Continuity mistake: Carrie cries out "where are our drinks!" and Samantha (yellow glass) turns around and raises her arms to call the waiter. But a shot later her arms are on the table next to her glass.
Continuity mistake: Right before and the moment where the girls sing 'Memories' the cigarette package on the table keeps changing positions in every shot.
Continuity mistake: During cocktails, Carrie says "there are 2 type of girls" then two guys in a suit walk by behind her. In the following shot they disappear.
Continuity mistake: Carrie holds the wedding invitation form the upper part, then from the side and then from the upper part again, depending on the shot.
Revealing mistake: When Samantha tells Mr Cocky to be nice and easy she is not naked, but wearing skin-coloured underwear.
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