There's something weird going on with DLC civs. I play with all DLC and only this mod. It seems to me that the game sometimes fails to load Aztec and Australian religious preferences. These civs sometimes have no religious info on leaders' civilopedia pages and I have seen Montezuma founding random religions. Given that both of them are DLC civs, there must be something related to mod loading process. I noticed that Montezuma gets his religion in civilopedia after loading saved game, no luck for Curtin.