I've seen a lot of mistakes with that leaderboard so I will tell some explanations about it.

• Formable Civilizations: This is for all the nations that can be normally formed in at least one scenario, for the moment it is accepting not normal formable civilizations in scenarios where the civilization can't be done normally.
• Miscelaneous Formable Civilizations: This is for the nations that can be normally formed but requiere a change of ideology or the formation of another civilization (Ex: Aztec Empire) or just that can be done by just clicking form civilization at the start (Ex: Abbysnya).
• Not Normal Formable Civilizations: This is for the nations that can't be normally formed in any scenario or that can only be formed in Age of Civilizations.

It is planned to remove all the scenarios from AoC1 in the Formable Civilizations leaderboard because those are the only useless scenarios for the category. And it is also planned to move Great Horde to another category because it can only be done in Kepler-22b being the only civilization that can be formed there.