Continuity mistake: Sarah Michelle Gellar's left arm is resting on the counter or not. Depending on the shot this changes back and forth.
The drought - S1-E11
Continuity mistake: When Carrie farts, Big's right arm is over his head on one shot and extended over Carrie's head on the following. Then back to the first angle.
The real me - S4-E2
Continuity mistake: Heidi Klum puts on an earring but a shot later her arm is lowered.
Secret sex - S1-E6
Continuity mistake: When Carries goes to Big's place to say goodbye she rises both arms. A shot later the right one is lowered. This changes back and forth.
Continuity mistake: When the girls are watching TV and eating popcorn, all along the scene Miranda's hand movements are not continuous between shots. Most noticeable when Carrie asks her if she hates the babyshower because it's Laney's, Miranda's hand swaps from reaching the bowl with popcorn to away from it.
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.
Cover girl - S5-E4
Continuity mistake: Carrie discards all the dresses and Sam lowers the ones she holds down to knee level. From the opposite angle she is holding them at chest level.
The drought - S1-E11
Continuity mistake: When the yoga teacher says "let the breathing go with you" Samantha's arms are lying by her side, half a second later they're spread apart, without her having made any previous movement.
Revealing mistake: When the baby is about to be baptised, it is replaced by a blatant doll: The doll's arm is stretched out (as opposed to the real baby's arms, tucked in his robe), and the doll's hair is very obviously painted.
Continuity mistake: During diner with Big, Carrie's bag is pointing in an 11 o'clock position, but when Big grabs his glass it points in a 1 o'clock position.
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: After spilling the sauce on the floor, when Miranda is discussing with her boyfriend her bag suddenly disappears from her shoulder. Later on it magically appears on the floor.
I heart ny - S4-E18
Continuity mistake: When Steven hands the baby to Carrie his chest is bare and arms are showing. When Carrie holds it he is fully covered and the arms are tucked inside the sheets. Then Carrie hands him to Miranda and the baby's arms are moving freely again.
I heart ny - S4-E18
Continuity mistake: While Carrie and Big are on the horse buggy, Big asks the driver to speed-up. When the horse gallops, Big and Carrie disappear.
Take me out to the ballgame - S2-E1
Continuity mistake: When Miranda tells the girls to stop talking about sex and men, the way the bills are laid on the table changes between shots.
Continuity mistake: When breakfasting, Sam pinches a blackberry but it disappears half a second later.
Continuity mistake: Carrie places a thick blue book on the right side of the fireplace, but a shot later it appears on the far left side.
Valley of the twenty-something guys - S1-E4
Continuity mistake: When Carrie checks Sam's phone number written on her arm, the ink is really noticeable in the close-up, but in the following wide angle it is light coloured and almost invisible.
I heart ny - S4-E18
Continuity mistake: When Carrie watches the leaf falling the curb is fully lit. When she bends down to pick it up there are shadows everywhere.
Continuity mistake: During breakfast, in the back shots of blonde Sam a brunette stand-in takes her place.
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