Hi Callandra,
I’m seeing this CSS added by the “McStudios Shortcode” plugin:
.container, .navbar-static-top .container, .navbar-fixed-top .container, .navbar-fixed-bottom .container {
width: 940px;
}
This is overriding the width you have set in the Customizer (1500px).
A plugin using a class like “container” isn’t very good coding – lots of room for issues with themes.
What you can try doing is add your own custom CSS:
body .grid-container {
width: auto;
}
Hope this helps 🙂