The social networking icons displaying on your site are displaying correctly. They are designed to tuck in like that. It's a feature of the Mystique theme and no it cannot be changed. To enable social networking buttons on your posts and index pages please see here.
To link your blog to your username > Dashboard -> Users -> Personal Settings -> then scroll down to Account Details. Then scroll down to where it says ‘Website‘ select the URL for your primary wordpress.com blog and then save changes.
Now every time you sign into the forum we can all click on your username and your blog will be linked to it. And every time you leave a comment on a blog your username can be likewise clicked and your blog can be instantly located.