Some doctors, who don't "believe" in the multiple personality alter "line of thinking" might call the different (personalities?) Ego states... ego states that don't have the communication link between them like (singletons) do...

Semantics. Doctors see the differences in those with this disorder...some just don't really know what they are seeing, and what to call it, and what they want to believe about it sometimes! It doesn't change what you all go through in the healing process, imo.