Check to see if you have any css applying any margins or padding, especially on these elements:
Frontier Options -> Custom CSS and on
style.css if you’re using a child theme. Most people make the mistake of copying ALL of the parent style.css code on to the child-theme style.css. Have you updated from a really old version of the theme? Padding on old versions (8 versions ago) was 10px, changed to 5px since then.