Hi.
<blockquote>1) in “Prova1” the description background opacity hides the description itself</blockquote>
Because you set “Main Item height” in Modules Manager -> JA Slideshow2 not high enough.
<blockquote>2) “Highlights Prova1’s image isn’t resized properly
3) if i set “iwth descriptions” in navigation menu, it gets images too</blockquote>
With JA Slideshow 2 in JA Ores, you shouldn’t use the article with image in its content. For more beautiful, you should input article with below format:
<p>brief brief brief</p>
<hr id="system-readmore" />
<p>content content content</p>