A question about the movie "A Lot Like Love" - Ashton Kutcher, Amanda Peet??

Am I going crazy or can someone help me out? I could SWEAR that when I saw this movie on HBO, it had a different ending. I could swear that after the kiss at his sister's wedding, another date flashes across the screen - 6 Months Later - and Ashton and his ex-partner in the diaper business are walking down the road and they walk past the window of a restaurant and he sees Amanda Peet inside... then he goes back and stands at the window and she is in there with all of her friends and stuff and finally she looks up and sees him and they smile and then he walks away.... so in reality they DIDN'T end up together. Am I thinking of another movie or does this have an alternate ending that I can't find on IMDB?? Thanks for the help! Maybe I'm "blending" two movies in my head???