In the alternative reality Leslie is Phoebe's husband. That makes no sense at all, Leslie was in San Francisco because he had to help with Phoebe's column besides he was in the Bay Mirror as well because of Phoebe. In the alternative reality Phoebe would have never been a columnist and never would have been able to work in the Bay Mirror. So how would Leslie be there? Besides a alternative reality would change Phoebe and Leslie's lifes so in fact they would not know each other at all.