I guess same issue has occurred again as it did happen in 100 Years War Scenario. While creating the map for Terra Incognita game just picks settings from the last created game.

My scenario ended up with Huge Map/Normal Pace/Empire Difficulty and every other map options set to the way I last created in a previous campaign. I'm not sure if world settings affect the map at all since this is supposed to be a fixed map but pace and difficulty is certainly different from what The-Cat-o-Nine-Tales described in Scenario Submission Guide in Contest section.

Not that it's really that important for these settings to be different since Hall of Fame will be based on Fame and not number of turns anyway but I just wanted to point out it here against any confusion it may cause for other players.

Actually it could play a role, because with that you can deactivate the effect of pollution.