The "balanced game" settings

I’m not understanding the “settings” that come up after you “click in” to each scenario. The sliders seem to be in the same positions for all games.

I’m trying to figure out why (for example) when I play Freedonia (sp?) after a few turns the number of religious people is 44% of my population! Should I be (manually) setting the “religious” slider to zero for that game? How can I set it back to “default” for the other games?