Link shared on Facebook points to page with no css

Hi,
I just installed this wonderful plugin on my website (http://www.lucalindemann.it) but there’s something wrong happening when I share a post about a project. In example, I tried to share on Facebook this post: http://www.lucalindemann.it/portfolio/poster-ods/.
Ok, it works, ’cause when I jump on my Facebook desktop I see the sharing post with its first image and a short description of the project and the link. The weird thing happens when I click on the Facebook shared post to jump back to the project page in my website: the page loaded is without CSS so it’s a total mess!! This is the link where you get pointed: http://www.lucalindemann.it/portfolio/poster-ods/?um_ajax_load_site=true
As you can see, there’s an instruction more about Ajax at the end of the string link that, I think, corrupts the correct loading of the page css. I don’t know if this is a mistake generated by your plugin or the wp theme (Nordic by Umbrella). What do you think?
Thanks a lot!!
Luca

http://wordpress.org/plugins/nertworks-all-in-one-social-share-tools/