Periodically I look for a post in my archive of over 6000 posts. I also have backup copies on my hard drive, in case the search boxes at the top or bottom of this page fail me. A couple of times, I've found posts in my "hard drive" archives that neither search box can find online anymore, and tonight it's happened again. I even search for key words in the post that wouldn't pop up in too many other posts--and it just doesn't appear to be online anymore.
It's happened again tonight. How do posts just disappear?