Continuity mistake: When sitting at the bar, Samantha points to Charlotte and her date, who are heading up the stairs arm in arm carrying nothing. Yet in the next scene when they arrive at the honeymoon suite, they suddenly have their arms full with a large bag and a basket.
Continuity mistake: When Charlotte dances with her boyfriend and tells him that his dad felt her up, her left hand swaps between being on his arm or not, depending on the shot.
Continuity mistake: After Charlotte has had sex in the honeymoon suite, her boyfriend's hair is all messed-up. A shot later it's perfectly brushed.
Continuity mistake: When Carrie meets Sam at the bar during the wedding, Carrie's right hand is either on the bar or holding a glass. This changes all the time.
Continuity mistake: When Miranda and Sam are at the wedding, after Carrie arrives Miranda has her pen in the right hand, passes it to her left and approaches a couple. Then there's a cut and she is now standing still, the pen back in her right hand and she is repeating her previous movements though slowly this time.
Continuity mistake: During the wedding, Sam is at the bar and asks for another Cosmopolitan but her glass is full (which makes no sense). When the waiter grabs the glass it's magically empty.
Continuity mistake: When Madeline asks Carrie to write something for her wedding, Carrie's pony tail moves to behind her shoulder.
Continuity mistake: When the girls are drinking on the steps of the house, Carrie talks about the toothbrush and her glass is lowered while she disposes the ash of her smoke. Half a second later her arm is raised and she is drinking.
Continuity mistake: After the party where a couple announces they're getting married, the girls are sitting on the steps having a drink. Sam takes a sip and lowers her arm. A shot later her arm is raised and she's lowering it again.
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