On another matter looks like a re-sync just occurred at 13.31 taking my target margin back to 5dB and 68 sync.
That definitely looks like a nice, single step backwards. All error rates returned to the previous 5dB step, and look manageable.
You seemed to get 800 ES's on the first partial day, 18 hours, and 1800 ES's on the next full day. That was enough to kick you backwards one step, but obviously not enough to throw you out to a 6dB setting.
That's the first time I've seen the 5-4-3dB DLM have to make a recovery step, and I'm relieved to see that it behaved with sanity.