Continuity mistake: When Carrie talks with Alek late at night at his studio, his right hand is on his cheek or not depending on the shot.
Continuity mistake: When Sam and Miranda watch the dog contest, there are two shots of Carrie: one with her arms down, listening to them; and a second one with her arms raised, fiddling with her scarf. This changes back and forth. (00:15:12)
Continuity mistake: When the dog contest starts, Miranda is clapping, then stops and lowers her hands. From the opposite angle, a shot later, her hands are raised and she is clapping and stopping again.
Continuity mistake: While Charlotte and Anthony groom the dog for the contest, a girl in a blue and white striped T-shirt walks by several times in all directions, no continuity at all. Also, the rest of the passers-by disappear in the opposite shots.
Continuity mistake: When the breakfast scene starts, Sam's hand position holding the mug is inconsistent between shots.
Continuity mistake: Alek cuddles closely against Carrie's back and places his chin over her collarbone. A shot later he is several centimetres away.
Continuity mistake: Miranda holds the Tattle Tale magazine with her left hand, but a shot later she holds it with both.
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