The other odd thing is that they grouped depersonalization with derealization in the DSM-5 (when they did the initial change in 2013 from the DSM-IV-TR) by now calling it depersonalization/derealization disorder, or something to that effect. They are two separate and distinctive disorders, but perhaps too many people experienced both at the same time (I know I do). They also grouped autism to just autism spectrum. So why then would they break down DID into these odd subcategories?