I am having a bit of a dilemma. Some time ago I conquered Siam and adopted their religion as my own (I didn't found one myself). Now, many years later, I am trying to pass a resolution trying to make this the world religion, but it is absent from the list. Note that the majority of my cities are following this religion. Is this some sort of bug? My capital itself isn't following the religion yet. Does it need to be also for the religion to become an option? I'm playing BNW, btw, and with a couple mods but nothing that effects religion. I've never run into this situation before, so any info would be appreciated.