Continuity mistake: During brunch outside, Miranda's bite on her muffin changes shape between the side and the front shot.
Continuity mistake: During the girls' chit-chat, the amount of ice tea in Miranda's glass suddenly decreases between shots.
Continuity mistake: While eating outside with Miranda and her baby, Carrie takes a french fry to her mouth, but her hand suddenly disappears in the following shot.
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