Multiplex Template Issues

Hi there. I am having issues with the Multiplex Template. I've posted it here as there was no forum folder for it.

I successfully hotstarted the template and everything was working beautifully. However, when I made some changes to the main menu, it changed the template from full screen to a set width. Please see screen shots attached. I can't find any issues within SP Page Builder, and I'm struggling to find where the CSS is drawing from that is causing this issue.

Can you please help?

The website in question is crewsports.com.au

Thanks

Please submit a support ticket and include access of your site.

Best regards,
Milos