Featured images get aligned weirdly

Hi,

I really like your theme and love how customizable it is with a little coding experience! ??

However even after I replaced the version .2 with the recent one (published today), the featured images I set still get aligned in a weird way when I have more than one post.

Website: https://www.teamsport-nadac.de
I used a resolution of 1000 x 300 px (as suggested, I think) for the pictures. Tried setting it to 900 x sth px, but that didn’t help. Any clues?
Thanks in forward!