Family tree got all mixed up after being in the university

Hi y'all, so when I went on to check the genealogy of my Sim (because I'm a fan of family trees and trying to build up my legacy), nothing else was in it but my sim alone. It's as if my sim is fresh out of CAS which is not. Afterwards I tried to make it drop out of the university to check if maybe it's part of the whole game system in the Sim University. When my sim arrived home, I checked on the genealogy again and they were back, but it became half-related with its brothers, and its father turned into stepfather. Could this be one of those after effects of CCs? What could be done to fix this? I'd appreciate the response.

It appears to be a issue with Sims 3 from the little digging around I done.