Greetings:
It appears that you had your margins set to “auto” for that particular element within your template.css file.
As you still have your “Optimize CSS” on, it is difficult to advise you as to the exact line the css rule you need to modify his.
Nevertheless, within your templates/ja_bistro/css/template.css file, find the following rule . . .
#ja-header {
background: url("/templates/ja_bistro/images/header-bg.png") no-repeat scroll center top transparent;
margin-left: auto;
margin-right: auto;
}
change to
#ja-header {
background: url("/templates/ja_bistro/images/header-bg.png") no-repeat scroll center top transparent;
margin-left: 30px;
margin-right: auto;
}
Save changes, clear cache, refresh your page and let me know if this is the desired result.
😎