barelybracelets - First of all, your bracelets are beautiful!
You have good questions. I wonder about the same things...
Someone had added me to their circle, but then removed. I don't know who it was, because I don't remember all who added me in the first place. But I found it interesting that they had removed me and wondered why. Was it something I did? Does that mean they don't like my shop? It left me confused, but I didn't lose sleep over it.
I haven't removed anyone from my circle at all. I find the circle pretty fun and interesting to view the activity. That's actually how I found this team! But sometimes I get info overload with all the items that people fave.
If I had a customer that wanted to make payments, I think I would "deactivate" the listing and wait to send until PIF. Although, if the customer puts the item in the cart and checks out (using check or money order), I think it marks it as sold and is removed from the shop. Then it won't be "counted" as a sale until you mark it as a paid item.
I don't think there is a way to mark as sold and keep it listed, but I'm not certain.
Hope this helps! =) Great to "meet" you!