Gallery strange output

https://sandbox.jinoh.dk/charlotte/wordpress/wordpress/

Click on “Galleri” to move down to the gallery. As you see, the images don’t show in a row. They show in a vertical list. I have tried looking in the CSS and template files but maybe I am just too tired to see it? ??

https://www.ads-software.com/extend/plugins/gallery-plugin/

EDIT:
On further research, I found the “real” gallery page. However, can I call the ?gallery=XX to the front page?