I see the appeal in wanting to treat the Trek universe as something consistent and tangible. For the most part, it is remarkably consistent, but there are obviously gaffes you can find not just between different shows but within themselves as well. VOYAGER tried to explain in "Fury" that maneuvering at warp drive was impossible, that you can only go a straight line... despite the fact that we saw ships maneuver at warp dozens of times, and continued to see it done well after the episode.
Vulcan has no moon... until it does, and then doesn't again, and then does again. For the longest time my biggest impression of Vulcan was that it mainly consisted of old temples, deserts, and caves. I don't think it was until I saw ENTERPRISE that I saw an actual city on that planet (before I would see TAS). The silliest was Amanda giving birth in what looked like a cave... I guess hospitals aren't logical?