Thank you for your reply. I do understand quite well how the privacy feature works. But the issue is not this friend seeing the posts. She cannot see the posts. Has no idea what they are and that's what's making her upset. She doesn't know what I'm posting but she knows how many posts I've made. How??
I also don't quite understand. You say that if a post appears on my page anyone can see it. I don't think that's the case. Are you aware of the "View As" feature? It allows you to see what your page looks like to any one of your friends. I've used this a lot and every single time I've excluded someone from seeing a post, the View As function clearly excludes that page. So that friend cannot see the filetered post. Unless you know that the View As feature is bogus.
I am using smaller groups and the posts this friend is complaining about are posts I made to one of those smaller groups that, in fact, has only one person
in that group. So, again, I ask how can this friend know how many posts I make? Isn't it supposed to be hidden from her completely? What am I missing?