Don't ask, don't tell - S3-E12
Continuity mistake: When Miranda is speed dating, a bell rings and the man she's with shakes hands with her. In the following shot he is extending his arm and shaking hands again.
Don't ask, don't tell - S3-E12
Continuity mistake: When the fake doctor tells Miranda he always wanted to sleep with a stewardess she has her arms up and standing out over her left shoulder, but they disappear in the angle shot from behind.
Don't ask, don't tell - S3-E12
Continuity mistake: While at Aidan's workplace, when Carrie kisses her she places her thumb next to his mouth, then it jumps to over his sideburn and then it jumps to being on his neck.
Don't ask, don't tell - S3-E12
Continuity mistake: When the girls are in a bar, the people behind Miranda don't match between the first wide angle and the first close-up. Then in following shots it's fixed.
Don't ask, don't tell - S3-E12
Continuity mistake: When Carrie goes to see Aidan working, she crouches and talks to him face to face. Half a second later she is standing taller than him.
Don't ask, don't tell - S3-E12
Continuity mistake: During rehearsal dinner Carrie says something about kilts when a woman in blue and a man with a grey suit walk behind her. Shot changes to Sam and Miranda on the left, where the couple just walked by and they suddenly reappear repeating all previous movements. Seconds later, Sam stands up and the couple is sitting and standing up for the third time.
Don't ask, don't tell - S3-E12
Continuity mistake: When Miranda says she's going to date a doctor, Sam is drinking with her right hand and then putting the glass down, but the shot changes and she's using her left hand instead.
Don't ask, don't tell - S3-E12
Continuity mistake: When Miranda blind dates Dwight Owens, he puts the beer on the table twice.
Continuity mistake: When Carrie leaves breakfast, the waitress disappears between shots. (00:03:32)
Continuity mistake: Carrie is trying to drive a car up a hill and a grey car drives close to them very slowly. When the car is side by side to Carrie, the shot changes to a wide angle and the grey car has vanished.
Continuity mistake: When Carrie gets to the WB Studios and stops at the guard's place, the image alternates between close and wide shots. The cars and people surrounding Carrie are totally different depending on the shot.
Continuity mistake: When Carrie is on the WB set smoking, her handbag is next to the railing. When the guard arrives, the bag is closer to Carrie.
Continuity mistake: When Matthew McConaughey cries "That's bullshit, Carrie!" he extends his right arm. A shot later he's extending his left.
Continuity mistake: After Carrie says "Thank you, Matthew McConaughey", his hands have no continuity between shots.
Continuity mistake: When at WB Studios, the position of the paper on Carrie's windshield is close to the brim in one shot, and away in the following.
Continuity mistake: After the WB Studios guard puts a paper on Carrie's windshield, a grey car is driving parallel to hers. A shot later the car is behind Carrie's.
Continuity mistake: When Carrie arrives at WB Studios, the guard has no paper on his hand, but one suddenly appears in the following shot.
Continuity mistake: When Carrie arrives at WB Studio there's a red car exiting that disappears in the following shot.
Continuity mistake: When Sarah Michelle Gellar asks Carrie to guess, Sarah has her right arm under her chin, but it swaps to lowered in further shots.
Continuity mistake: When Sarah Michelle Gellar says she loves Carrie's shoes, Carrie's right arm is up. A shot later it's lowered.
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