Issue with image and type doubling in prototype on Mac web app

So I have been doing a remarkable amount of prototyping pages and this one, no matter what, is doubling content for no apparent reason. It’s driving me mad. Anyone have any idea what’s causing this?

I would love to show you, but when I upload an image to this post, it does it, and then last minute is reads “Sorry, you cannot embed media items in a post.” Why? You could before. Why even have an upload button?