Sorry might be a long read :(

I've read through this subs top few posts explaining disassociation and I think I get the jist of what it is but I'm still a little confused. So what I've gathered is that a big part of it is the involuntary mind wandering/spacing at (frustratingly) random times or triggered by emotionally intense moments. As well as an out of body like feeling or feelings of disconnect/discomfort after and some sort of memory jumps.

I've had lots of trouble, especially lately, with my mind distancing at the most inappropriate times and almost all the time. I'm often found standing around at work trying to figure out what I was just doing or about to do and not quite sure what task I decided to complete next (I run a department in a grocery store so there are always a lot of areas of focus for me to chose from when planning out my day). In conversations with pretty much anyone I find I am always half listening and just vaguely aware of what they are saying. In the moment I dont know it but in retrospect I find I'm instead pondering about myself or giving myself "ratings" on how I did in some preceding interaction with someone (said hello weirdly? spoke too loudly, said the wrong thing, etc.).
I've always thought these to be a sign of some sort of attention deficit but now I'm thinking its disassociation? 

Is there a correlation between disassociation and attention deficit disorders? Is it just a really big grey area between the two? 

tl;dr still confused about pinpointing what disassociation is specifically regarding the memory loss aspect of it. 