I dont think its anything to worry about Always.....when you are on the first leg of your spiritual journey, there is a lot of energy work that happens while you sleep. energy centres whirl and twirl, spirit work with your subconscious and all sorts of magical things can happen ~ moist of the time we sleep thorugh it oblivious to iuts happening. Thats one of the reasons why its so important to ground and protect and close things down a little at bedtime so that you don't wake up with a thumping headache. Because AA Michael is so powerful is probably why you are sensing him in your dreams, its nothing to worry about, I think just a confirmation that you are one of his light workers, like so many of us here on SMDC.
I'll be interested to see if Silver and Polly sense (or have sensed) him in their dreams......