1. There is currently no passport in the game. All of Harem Collector will take place in the Middle Kingdom. Future games in the series (HC 2, HC 3, etc.) will be taking place in the other countries but will still be limited to those countries.
2. Currently 'The Cult Following' cannot be completed. There's a few reasons why it's sorta left hanging but if you've complete "Dude Where's My Sword?" then you've completed all of the Demon Cult quests thus far and don't need to worry about more until future updates.
3. Hmm? I'm not quite sure what you're asking here, could you try rephrasing, attatching a picture, or emailing your save file to me at conash@badkittygames.net as I'm really not sure what you're asking, sorry.