maybe I just got that wrong, or maybe it is a bug. Anyways:
I set the default layout for blog posts to medium image / right sidebar in the theme options panel - because that is what I want them to be like on single post view.
For my blog page (overview with excerpts) I created a custom template in the template builder and chose small preview images in the settings for the blog section. Assigned that template to the "blog" page.
But: medium image is displayed.
So - what would be the correct way to have medium image / right sidebar on single post view and small image / right sidebar on the "blog" page