Two columns

Are you talking about the frontend?
And did you have custom CSS added?
Can you share the url to your website?

Hello Marcel,
Yes I am talking about front end.
Yes I use custom CSS.
Link: https://www2.fasten-und-essen.de/gaestebuch/ or (later) https://www.fasten-und-essen.de/gaestebuch/.

Ah, I understand.
There was a “clear:left” added for theme compatibility.
You want to add this to your style.css around line 470:

html #gwolle_gb .gb-entry {
clear: none;
}

Thanks a lot, that solved the problem!