Turns old posts private randomly, automatically

Since June, I’ve had this issue where several posts are turned “private.” This is often random, although now it seems limited to a select group of older posts.

Also, the post is not the same. There is a visual/text button, and the entire post now fits into a small box.

I repeatedly go back and restore previous versions of the post. I have several users — and history shows that they did this to their own posts. I’ve asked, and they didn’t. They didn’t even modify them.

This is an image of what the posts looks like from the editor view: https://unsettledchristianity.com/screen-shot-2016-08-26-at-5-28-33-am/