Yes to this. I know this is the *itching post, so feel free to vent away. I don’t think this was a personal affront or insult. The administrator posted about her DD selling cookies on her personal FB page, not the neighborhood group page. If she had posted on the neighborhood group page and then removed or blocked yours, that would be a different story. I would not take this personally and just see it as the administrator keeping the rules in check.
As for the FB like, I wouldn’t read into that either. The liker is just liking the posting rules reminder. People like things on FB all the time.
I’m sorry you feel hurt by this. Hopefully you can see it from a less personal perspective.