There's also a discrepancy I found in the first couple days of G&K. IF a religion has been enhanced and IF there are no more pantheon slots, IF a civ somehow acquires a great prophet and uses it to found one of the religion slots still available, even if they had no prior pantheon, they now get to pick a pantheon choice when they pick founder and follower beliefs. This is a time-and-cost-effective trick, especially for founding a religion if you're isolated in immortal or deity difficulty. Don't even bother building shrine/temple etc, but rather rush hagia sophia or use your liberty great person as a prophet.