I noticed the Green Grove tapes discrepancy as well -- the only conceivable way they could have caught that conversation was on a parabolic microphone, but even then, it was very windy in that scene, so the sound quality would have never been that good as it was when they played the tapes for Tony.
I have seen that episode a few times and picked up on that too. It was so windy that someone's hat blew away in that scene. I remember Livia really trying to sell the idea of killing Tony being the right thing and Junior doing his best to ignore her. She mentioned something about a distant relative having a lobotomy and equating it Tony "better that she was never born."
The final 3 episodes of Season 1, "Nobody Knows Anything," "Isabella," and "I Dream of Jeannie" were amazing.
A few of the lesser "Soprano" characters appeared on "Seinfeld." Neil Minck, Junior's first lawyer, sold Kramer a used wheelchair. And Assemblyman Zellman was an NBC executive toward the end of "Seinfeld."
