[RL] Sims changes Dynasties/Constant message after loading

I play with the Cordelia and Thiago household, which are both in the Thebe Dynasty. Whenever I quit my game and open my save, the first message that pops up is that Thiago joined the Arbrantes Dynasty, so I have to make him quit the Arbrantes Dynasty and put him back in the Thebe Dynasty, which makes me lose some unity points or whatever it's called and some ranking (last time I played Cordelia was rank 3 and now everytime I open my save file she's back to rank 1) so I always have to "start again". I love the new Royalty & Legacy pack but honestly I haven't been able to play since the new update because it's making me rage quit. Please fix this.