I know what it's like to be in a relationship with an alcoholic.
Things are fine, and then...
I'ts stressful, to say the least, and once the cycle of sobriety and relapse starts to get going, it's not likely to stop itself. Which means more high highs, and low lows.
Your AH has slipped several times now, and is back to being an active alcoholic. It;s back to square one for him in terms of healing. I have the feeling he's using his sober time as a kind of sober-man's collateral, meaning he's hanging on to his self image as a person in recovery.
It may take a long time for him to admit to his real status: A couple of days sober, or still drunk, 30 days from his first AA chip, starting whenever he's ready, which could be never.
Which leaves you in limbo, as no one knows what's ahead.
My sincere advice is: don't waste too much of your time or spirit waiting for him to get back to the reality you remember marrying into.