Yeah, I am of the opinion that OCD (or CDO...alphabetical order and all) has some some correlations with PTSD. It may not be in the DSM-V....but still.
I tend to pigeonhole, categorize, section, segment things in my mind. If things exceed the scope of those boundaries....ewwwww, can be ugly (if only tween my own two ears)
I also have ADHD (minus the hyperactivity) and I think a touch of OCD. Yes, things must be absolutely perfect, but only for a moment or two. Look, a skwerl....I like toast