Hi Anne-Sophie,
I see the share counts on both sites right now for Facebook and Twitter, and for LinkedIn on devargas.com.es (you are using the Icon + Text style at the moment).
As for the fact that the whole site is being shared rather than the post URL, I suspect that it is because you have the All in One SEO plugin installed and active, yet you haven't configured it to output the OpenGraph tags properly. Can you activate it's Social module and make it generate the OG tags, and then try again? Let me know when you've done that, and I'll check as well. By the way, doing so will allow to you Publicize your posts properlto Facebook as well (as it is, without the right tags, Facebook won't accept Publicized posts if you were to try).