widget not using correct URL

quick question im sure but can someone go to my site
https://www.legacy-university.com/

and down at the bottom “Get Social” section hover over the facebook link. Obvious thats wrong and will take you to an error 404 page.

This widget however has only the following URL showing
http://www.facebook.com/legacypracticesolutions

So why is it also appending my homesite to the facebook url?

thanks,
Nate