Hey @Regulus!
I took a look at your site in the editor and noticed that you have this code in the Header Code field in the Advanced settings for your blog page:
<h1>Blog | Dr. Fabio Boccaletti psicologo e psicoterapeuta</h1>
That code is going to be placed within the <head></head> and will cause rendering issues, and might also be preventing bing from properly indexing your posts.
You also have this code added to Settings > SEO > Header Code field which will also cause the same problems:
<a href="https://plus.google.com/+PsicologomantovaNetFabioBoccaletti" rel="publisher"></a>
<a href="https://plus.google.com/+PsicologomantovaNetFabioBoccaletti" rel="author"></a>
I'd recommend moving both sets of code to the Footer Code field so they're placed within the <body></body> tags, then re-publishing your site.
