Faith cost raising without any purchases

Hi all

I would like some feedback here.

Faith cost for anything BUT the Great Prophet is completely out of control. First faith cost of missionary/pagoda was 400 faith, whereas for 300 I could buy GP. Bought GP, subsequently price for Pagoda/Missionary/Inqui went to 600 ???

I did never buy anything besides the GP during the game. My faith here is a total dud

Any feedback on this would be appreciated

Pat

EDIT: Playing G&K with latest patch, Campaign edition for MAC