I may be mistaken, but I saw this episode again a couple of weeks ago and if I'm right then what I noticed certainly seems odd. I know the maitre'd ("Five, ten minutes") asks Jerry, "How many?" and they go into that discussion about Tatiana before finally answering, "Four."
But here's my question: Does the maitre'd ever take their name? Certainly he uses it ("Seinfeld, four!"), but we should hear him get their name first since the episode's in real time, and I don't think we do.
If I'm right, then this should qualify as a "Seinfeld film flub."