Hello,

Thank you very much for choosing our theme and contacting the support.

1/ Please deactivate Categories in page heading and Shop title (if necessary) to remove the duplicate. If you want Page title, deactivate only Categories. Navigate to Theme settings > Shop > Sidebar & Page title and you will find this option.

2/ If you want to add icons to the categories enter each category and add previously uploaded icons as shown http://prntscr.com/j9i0cj

Best Regards