I found a solution to this problem.. I installed this plugin that solved my purpose: https://blog.wonderm00n.com/2011/10/14/wordpress-plugin-simple-facebook-open-graph-tags/
But i am still not sure why does facebook does this or is it wordpress’ fault!!
WordPress is the most used tool to design websites today and FB is the first option to share any link. So it is expected that these two legends should talk to each other without the need of any plugin in between. In any case, my problem is solved for now… So i m very very happy…. ??
