You're right, my error. I had a friend mention that she received two separate text messages, the first being about the post, the second being the context (i.e. they were added to a circle). I mistakenly assumed that they weren't sent together and sent in the opposite order. Might be nice to somehow communicate more explicitly that no one is notified until after you post something in a circle.
Yes, I agree! That is something we are working on. We are in a difficult place because we are extraordinarily cautionary about what messages we send through email/text but we don't to clutter the UI with alerts and confirm dialogs.
Sam, slide to delete works on phone numbers, circles, stories, people in your circles, and other places in the app where you need to remove data. Hope that helps! vibhu@everyme.com if you need more assistance.