I have since gone thru a small version of hell. I’m running Linux as my main computer, but also have and sometimes use a now-Win10 laptop. I don’t need AV on Linux but use Frontier Secure on the laptop, where Win10 is a recent update from Win8.1. There I found that the Win10update had disabled or wiped out Frontier Secure AV, and so spent over 2 hours getting it reinstalled and running a full scan. About 21 malware items were found, quarantined and removed, so that was a good thing.
Back on the Linux box, my theme Frontier (not to be confused with Frontier Secure) showed nothing about AddToAny. So then I went to your Settings and simply deleted the “whatever” within that /Floating/Additional Options box. After some checking of articles, I see no more duplicate AddToAny items below my posts. I have no idea how that Additional Options box was filled, but being now empty was apparently all that was needed. I do wish that you’d suggested that from the git-go. I do like AddToAny so I this makes me happy again.
So my issue can now be marked “resolved” but somehow it seems to have already been so marked. I thank you.