So then I did another test, I went to this post and edited in the word blushing
https://www.backyardchickens.com/threads/welcome-to-my-pond-swim-wade-or-sit-on-the-bank.1101447/page-13911#post-20541624
That same word is also here...
I was trying to find an older post of mine and this happened:
This says I have 1294 posts in this thread.
but the search only found 200 of 1294.
Then I tried this:
And got this: