Did you have other people take a look at him / saw him happen when logging in on more than one occasion?

The way Square Enix games are built, sometimes the video card loads half of the information, pops the NPC underground with their name sticking out of the floor, and tells your PC, "Yeah, that's about right."

Ignore this if more than just you saw him stuck in a table; but if it was just you, I'd try going back and checking out again to be sure.