no Formatting on post-preview index.php

Hello,

i’m working on a new layout for my blog. Actually i’m editting an existing theme. It’s allmost perfect now: https://www.mdstyling.nl

Yet the post previews on the frontpage aren’t showing any markup. They won’t show a picture, nor the entering/paragraphs..

Do you know how i can fix this? I’ve searched and searched and searched..

Thanks!