Continuity mistake: During the party, when the music starts the man with white bermudas and light blue shirt behind Charlotte keeps changing positions between shots.
Continuity mistake: In the duck pond, Big's wet hairstyle changes between shots. Also Carrie's, from soaking wet and straight to slightly curled.
Continuity mistake: After Trey and Charlotte have sex, the way his jacket lies on the box changes between shots.
Continuity mistake: At Charlotte's, Sam reaches for the Martini on the fireplace and turns around. A shot later she is reaching again for the Martini and turning around again.
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.
Continuity mistake: While unpacking at Charlotte's place, she holds one candle in one shot, but they suddenly become two a second later.
Continuity mistake: A couple with a man in green holding a brown notebook walk behind Charlotte but disappear in the following shot. (00:03:50)
Continuity mistake: After Charlotte twirls her drink swaps hands between shots.
Continuity mistake: When breakfasting, Sam pinches a blackberry but it disappears half a second later.
Continuity mistake: Books on top of Charlotte's fireplace fall down between shots. (00:10:02)
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