Hi Bulldog! Congrats on your 13 months!!
I just passed my 2 year sober date, and about once a month I STILL have these dreams. Not as often, and actually I can't remember now when I had one the last time (maybe they're finally gone?).
When I was in counseling, the first 6 months of my recovery work, my counselor mentioned that even 'behind the scenes' (while we sleep, think of other things, etc) our brains are processing a LOT of stuff, and sometimes that might come out in what we dream about. He told me to look at it like taking a free 'pass' at returning to what I had been doing, feeling the feelings attached to it, remembering how happy I am that I'm not there anymore, and wake up having done nothing wrong at all.
I think it takes a while for our brains to heal, our psyche's to process the things we've gone through and work on.