When George is in Rudy's and Rudy says that when moth larvae hatch they are everywhere, he and George are standing next to each other. When the camera angle changes, George is on the other side of the shop and Rudy is behind the counter.
The reason than Jerry and his girlfriend make out during Schindler's list is because they can't get any time alone (Jerry's parents in town). At this point, Jerry is a successful comedian and just bought his parents a trip to Paris. He could easily afford a hotel room for some alone time with his girlfriend.
Newman is seen completely bald ten episodes previous in S5 E8 'The Barber' after Jerry took revenge by shaving his head. In this episode he has a full head of hair.
There have been beltless trenchcoats since there have been trenchcoats and they are still being made.
George says that a paella is seafood, meat and rice. No self-respecting Spaniard would ever mix seafood and meat together in a paella. A traditional paella is pure seafood and rice. A meat paella is a twist on the traditional paella, but it never contains seafood.
At Rudy's Antique Boutique, he explains to George about the moth-ridden cabana clothes he sold to him: "All it takes is one moth to lay eggs. You know what happens to the larvae? They hatch and they're everywhere." Larvae don't hatch. Eggs hatch and the larvae molt.
Kramer said he'd take care of everything with the trenchcoats, so it wouldn't matter if they arrived after Morty left.