Can't create new civs above level 10

Whenever I create a new civilization in offline, it's always level 10 no matter what. I leveled Russia to 50 in TAD and thought any new civs created would become the same level but they all became level 10. In the past it worked, but for some reason it doesn't anymore. I've tried looking everywhere for anyone else who had this problem but it seems like I'm the only one who has it. I just want to play the other civs with all the cards unlocked without grinding for every single civilization. I know there's modding or changing the files, but wanted to know if there was anything else I could do before attempting those.