Power Pack Content Grid same photos

Hello,
I am trying to create a web page, with a blog. I am trying to use the PowerPack Content Grid to display the blog posts on home page.

However, each time I create a new post, it uses the photo of that post as the photo to be displayed in all previous posts … so all posts are with the same photo …

Is it some configuration that I have to change and I’m not getting? Is it a bug? Does anyone have any ideas?

Thank you very much for your help.
Ana