I was also under the impression that my insert points were not displaying but I am now assuming that you are limited to adding blocks to the auto layout sections. Is this correct?
I have added an auto layout / simple list section.
When I click Edit Content, I have used the toggles turn elements on and off, and I have used the content tab to edit content and the design tab for style changes.
I wanted to add a paragraph under the Title but I can only add another column to the layout.
I am going to add a blank section instead and style from scratch.