I've only recently discovered FfH2, and am not a very good civ player or knowledgeable about Civ, so I'd like to apologize if this is not a bug, not a FfH2 bug, or if I'm too vague.
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Any ideas what's happening?
Install my modmod (see link in signature) and try again (you'll have to start a new game). If you still see this issue, post a savegame in the forum and I'll look into it.