Forever Theme: Problem with slide

Hello,
I’m using a Forever Theme, and i want to show the destacte post in the slide, but i have some problems.
I have to fix entry and the slide only show one .
The image are correct dimensions 888px x 355px, and i try to put the same photo to the two entrys but the slide show only shows me one photo of one post, not the two post that i’ve marked to fixed.

Whats the problem?

Thanks

You can see the blog here:
https://www.elpanaderocasero.com/?theme=forever-child