> I'd expect to tell it to book a 6pm table for 2 and wind up with an 8pm table for 10.

That's a win, consider: It's the right restaurant, on the right date and 10 is larger than 2 so there'll be room enough. Ok, you have to wait two hours but given that this tiny place is normally so busy you have to book in advance what you lost in time waiting you will more than make up by the fact that you'll be the only people there expecting service.