Unrelated: The current map of Atamara really makes Rieleston's name obvious. (Emphasis added, necessary or not.)
Other than comedic effect, why is Eston's label all the way over there?
It does funky stuff like that... If the labeller can detect where the capital is, it should probably consider that for label placement. I doubt it can, though...
Same for duchies, with the duke's region (if any).
Otherwise, it should label the biggest mass (if it can). It seems to favor the smallest mass more often than not.