I'm not sure why he would say that you "most likely" don't have a gallbladder because of a malrotation. It sounds like what you are talking about is an intra-hepatic gallbladder. Usually the gallbladder is attached to the undersurface of the liver by peritoneum. Rarely, the entire gallbladder is located within the liver. Removal requires that one go through some liver tissue to get to it.
He says this after my gallbladder not showing up on an ultra sound or a mrcp within the last 2 weeks. The ct that refers to my gallbladder as being hepatic was in 2005 or 2007. My records are at work and I just found this website.