Icons not working in home page

Hello, I try to use icons in home page, like in your demo http://preview.hb-themes.com/?theme=Highend
I’m using icon shortcodes from this page: http://documentation.hb-themes.com/icons/

I was able to change icons for first 4 columns (Ultra Responsive Layout, Trendsetting Design, Live Page Builder, Packed with Features)

But I was NOT able to change icons for (Employees, Projects Completed, Pixels Pushed. Devices Used).
The default icons are working, but if I enter any other icon from icons page it’s NOT WORKING.

Where is the problem?
Why icons do not appear in that section?

Please find attached screenshots.

Also other issue. If I open Home page in Visual Composer editor, bottom sections gets doubled… So I have to use backend editor for home page to remove double content. Somehow it adds same shortcodes two times.