You should use this guide to play with BI to get rid of some inconsistencies like having to use provincial campaign to play etc.
https://forums.totalwar.org/vb/showp...3&postcount=85

I also read in the complete EDU guide by Aradan that the long_pike attribute is supposedly removed in BI. Does that mean that if you play with BI units using this attribute do not function as they are supposed to?