The college of cardinals is missing from their view screen. Only the Pope and my appointed Bishop can be seen. It makes sense for earlier start dates, but after 1066 they should be there.
That's a vanilla bug, don't remember why/when it happens.
I get great holy wars in pre 900 start dates even if is set them in the game rules to start later.
When do you get GHW/Crusades/Jihads?
Game rule can only delay for a certain number of years if they're activated.
The jihad weights are messed up. For example, Nikaea has a weight of 250 while Jerusalem has 75 and Africa only 20.
Known, and I think it's fixed in dev version.