The New World Order decision is bugged.
If you use the decision at any point post-schism, and pick any of the options where it would effect the Pope (Everyone, Only Catholics, Only Christians), this then opens two windows. One asking about the Pope, the other for Merchant Republics.
Selecting any answer on the pope window will make it go to the Merchant Republic choice. So now you have two windows. Going down both chains you can pick different opions and the end result it it breaking down the world twice.
So if you wanting kings you get dukes, if you wanted dukes you got counts.
I've got the correct check sum (AWGG).
Note: Near as I can tell it works as it should pre-schism. Although you might think of adding something to the tooltip that tells you that picking the Schismatic Christian option doesn't flip the religions of the rulers immediately and that the schism event may take a few months for fire.