About a week ago I updated the WP software. All seemed fine, and I have no specific reason to think this caused probelms, though no posts have been made since.
One of our newsposts from 2014 got resent to subscribers yesterday. I checked to see if it was changed recently but as far as wordpress is concerned it hasn't.
To answer Matt's question in advance:
This happens on our site from time to time yes, just last week i deleted a few posts that were never published.
The same problem, today there was a message to subscribers, with an old post from 23 Aug 2017, the article did not change from the indicated date of placement
I turned on the flag not to publish on one of the materials for the date 02.11.2017, without deleting it.But because of this, old publications should not be sent.