I just encountered an annoying bug in the Huge Earth map. If you choose specific opponents but don't fill all 18 slots (i.e. if any are set to "Closed"), it will automatically add one more civ than you specified. Which one seems to be based on where they are in the drop-down menu, with the first listed leader of the first non-included civ on the list added: If you didn't include the Celts, it will always add Vercingetorix. If you *did* include the Celts, then it will add Richard of England. If the Celts and English are already in, then it will add Clovis of France, then Willem van Orenje of the Dutch if you manually included Celts, English *and* French, etc. (The last two break the pattern a little, since the Dutch are above the French in the menu. I'm not sure why that is.) I haven't tested any of the other included maps to see if this applies to more than the Huge Earth one yet.