Thank you vlad, 3,4 solved;

1.my logic would be: I use category A (featured) for the big grid flex 2. Category B (news) in the box below. if one post is in both categorys (and within the number of posts i choose per block) it should only be shown once. that doesnt work. https://www.dfz21.at/dfz/

2. That works on the Home. But how can i use a flex box in the widget aera ‘Newspaper Home”?

5. So that doesnt work in the default post template?

6. i think my settings are correct: The sidebar simply doesnt start at the same height as the post on the left side (with the breadcrumbs).

7. and what would be the code to get such an elemtent?

Br, Niky