Front page behaves weirdly

I am using the Tempera theme. I noticed that new post were not showing on the front page since the last update.

So I turned off the presentation page option. This did not help. The same old presentation page showed up, still without the new posts.

So I changed themes to see if that would help. All of the other pages showed the new theme, but the front page was still as it was, with the old theme, presentation page, new posts not showing.

I dumped the cache multiple times during this process, both the site cache and my browser. Nothing helps.

Before I try deleting the theme, I wanted to check here to see if others were having the same issue. I noticed that I could access the dashboard from other pages, but not from the front page.

Is there some way to fix this, or should I just be glad the site works at all, and hope the next update fixes it?

The page I need help with: [log in to see the link]