Doesn't it always seem that just when you are starting to get things in order the alkies start trying to drag you down again? They say animals can smell fear....I think alkies/addicts can smell progress...jeesh.
Keep doing all those things you have been doing and try not to get distracted with his crap. Your gut instinct is telling you he is not making real progress and I am sure that is the case. It is so much easier to trust our own perceptions when we don't have someone around gaslighting us all the time, isn't it?
Stay strong!