If I understand you correctly, your psychiatrist decided to use your most recent diagnoses from your most recent admission. He's allowed to do that. What I'm not clear on is the conduct disorder family focused. Was your admission around the same time your sister tried to become your guardian? Did you become aggressive with your sister (it doesn't have to be physical) and she reported it? Also, conduct disorder is usually a diagnosis of children. Adults don't usually get that diagnosis. They get a different one. Anyway, you need to have a conversation with your psychiatrist about the conduct disorder dx. Bipolar disorder and PTSD make sense. The conduct disorder is odd.