There are 6 social buttons at the bottom of each question. 

The 1st two (email & Twitter) share the complete path of the question, e.g. 
myDomain.com/index.php/categories/food-restaurents/45-question-1 

However, the other 4 social buttons (Facebook, Google+, Linkedin, Pin It) share ONLY the website root URL, e.g. (myDomain.com). 

You can check it out on my dev environment, for which I will send you the access credentials by email message.