'Running away' after time together is something i can relate to. H and I have an uneasiness when we first meet up again and then on departure. It's awkward.
Like Mr GAG, my H is inconsistent in many things. He has just started to use my name in email correspondence. I think he senses when he lets himself get too close and he backs off. Perhaps your XH is doing that too and that's why he has reverted to the more formal sign off.
Hope that peaceful feeling remains. Like your intuition!
