Continuity mistake: Oliver extends two fingers to order a Martini, but a shot later he's just extending one.
Continuity mistake: Right after Charlotte leaves to dance with Gordon Carrie's right arm is raised or not depending on the angle.
Continuity mistake: At the club, Anthony is standing alone, and so prove the angle shot from behind. Then he introduces Gordon who cuddles next to him, but from the angle shot from behind Gordon disappears and we're back to the very same shot of Anthony alone.
Continuity mistake: When Anthony appears, a piece of rectangular confetti suddenly appears out of nowhere on Charlotte's hair in a mere half a second.
Continuity mistake: When Carrie and Charlotte bump into Anthony at the club he extends his arms and holds Charlotte's hands, but his arms are not extended a shot later.
Continuity mistake: When Charlotte leaves dinner to argue with Trey she leaves her napkin on the table, but it disappears a shot later. A shot later it reappears.
Continuity mistake: When the girls have dinner, Carrie has a glass in her hand that swaps to a napkin a shot later.
Continuity mistake: When Trey shows up at the diner his hand is away from Charlotte or cuddling her arm, depending on the shot.
Continuity mistake: After Charlotte tells Trey that the girls are coming over to dinner, he is holding a cup in one shot and a newspaper a shot later.
Continuity mistake: While having breakfast, Trey folds the newspaper and then the shot swaps to an aerial angle where the newspaper is back to unfolded.
Audio problem: After Carrie and Miranda are served their drinks and the credits roll, they have small talk about flying to Rio but their lips are not moving or are not in sync.
Continuity mistake: When Miranda says bye to Steve after he proposes, in the front angle she holds the door from the upper part, but in the angle shot from the side she is holding the middle part.
Continuity mistake: When Carrie gets in Big's car a group of bystanders can't help staring at the shooting of the scene.
Continuity mistake: After Carrie tells Miranda "Now that I'm stuck with the bad ring" there's a wide angle where Miranda's right arm is suddenly raised against her cheek.
Coulda, woulda, shoulda - S4-E11
Continuity mistake: Aidan and Carrie are out on the street and he asks if her name is really Carrie. Right then two women walk behind him but disappear in the immediate opposite shot.
Coulda, woulda, shoulda - S4-E11
Continuity mistake: When Miranda says she's keeping the baby, the spatula on the table is facing down but swaps to upwards a shot later.
Coulda, woulda, shoulda - S4-E11
Continuity mistake: Carrie and Aidan are outside the restaurant and a man with a tacky long red shirt walks by. Several seconds later he walks by again.
Coulda, woulda, shoulda - S4-E11
Continuity mistake: When Carrie greets Chad, the way he holds the pen changes in every shot. (00:20:30)
Coulda, woulda, shoulda - S4-E11
Continuity mistake: At the pizza parlor, the way Carrie holds the Coke bottle changes between shots. (00:15:20)
Coulda, woulda, shoulda - S4-E11
Continuity mistake: When Charlotte and Miranda bump into each other on the street, there's a bald man behind Miranda who comes close to her, then a shot later appears further away and, finally, disappears in the opposite shot. Several seconds afterwards he finally reappears.
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