Just reading a bit about differences of schizoaffective and DID, they do present differently, yet it's understandable the confusion. I didn't see if PC had archive articles.
To diagnose DID, there's looking at trauma as causation. Schizoaffective would have neurobiological (genetic) component and is considered a development delay. (Note, the learning disability on your sheet). Also read that there could be a reaction to bullying or trauma that could bring about the hallucinations.