Hi,
1) Use your full actual twitter URL, first make it blank, save and enter again and save. I have just retested this to be sure. Profile fields are for author box, the ones in the header are available in Customizer -> V3 control panel -> Social
If issue still persists send site details and login to [email protected]
2) line 72 and 75 of content.php inside theme theme folder, edit like below, we are only adding locale=en_US&
//www.facebook.com/plugins/like.php?locale=en_US&href
//www.facebook.com/plugins/share_button.php?locale=en_US&href