I think your underlying question is, is your experience typical (or 'normal') for PTSD folks? I think bec hit it on the head, there are many types of dissociation. I don't think mental health experts totally understand dissociation or the different types, because the categories still seem very broad while our experiences are so varied.

I find that I use different words to describe my different types of dissociation. There are times when I feel disappeared--like I'm not really there, I'm just a pair of invisible eyes watching everything. I feel most childlike at these moments, and it usually happens when I feel scared.
There are times when I'm gone--when my body is present but my mind is in a black hole and I feel like I've been turned inside out. This happens when I get scared or feel exposed.
Sometimes I feel dead--flat and unemotional, very detached. This happens when I get angry, especially.