[Theme: Grid Responsive] Load more content doesn't work

Hi there,

I’ve downloaded and installed the newest version of the theme Grid Theme Responsive from Dessign.
After copied all the posts from another blog-system manually, I noticed, that the “load more content” function doesn’t work.

I have 9 posts in category “blog”, but when open this by menu, I only see 8 of them in 2 rows. When scrolling down, the “Loading” image appears, but stops with “Finished loading” and the 9th posts doesn’t show up.

Also there a some more problems: the theme isn’t responsive (also the demo-site of the theme isn’t), and at the demo-site in category “blog”, there’s the title and the content under the posts-picture, at my page it’s all like the the home-grid (title and content appears, when hover the pictures)

https://hilke-gesabussmann.de/