Hi YoungMarston,
I think if your anger is really bothering you, is really troubling you, then, to me, it's safe to call it an 'issue', yes. But, I mean it must obviously be tied in with your current diagnosis of schizotypal, and PTSD, and the hearing voices, etc.
Well, to my mind, just because a person has some anger issues doesn't necessarily make them a sociopath. But hey, I'm really no expert on the whole subject. Do you have a counselor? If so, it would be a good place to explore such a question. Absolutely.