1) It's not really that hard to notice, I noticed it a couple of times but never made note of which episode in which it happened. Now I'm thinking "Do I go thru 9 seasons to find it? It's easy, but time consuming...". Here is a break down;
Someone comes in (probably Kramer) and slams the door behind them but the slam is too hard and the door slowly opens in the background while dialogue proceeds. The actors notice but keep leaning against the door in hopes tha nobody notices. They were obviously quite successful.
Your stumper is a good one, I'll keep my eyes peeled for that one.
2) Awww, Courtney Taylor is the name of the actress who plays the 2nd woman that George interviews in that episode, I'm looking for the name of the actress that plays the 1st woman he interviews (when George says "I'm looking at you and I can't even rememeber my name", NOT the one to whom he says "I'd give up red meat to get a glmpse of you in a bra").