Thank you for your question.
We have just visited your web-site and see that you have already configured our header. If you still need some help ask more detailed questions.
All the necessary configuration you can find in Admin -> Theme Settings -> Header. Here you can change header’s layout, menu align, shopping cart widget style, additional information, colors, top bar etc.
Our theme comes with three different product layout styles. On our demo we use “Default” style and your site uses “Alternative” one. You can switch between them in admin -> Theme Settings -> Product Page -> “Product page design”. After changing you will see share buttons styled like on our demo site.
Hope this help.