Widgets in sidebar area…

The issue appears to be with this style you’ve added:

.widget-container, .post-template-templatestemplate-home-grid-post-php .widget-container {
    float: left;
    padding: 0 1%;
    width: 31.3%;
}

Please update that to:

.post-template-templatestemplate-home-grid-post-php .widget-container {
    float: left;
    padding: 0 1%;
    width: 31.3%;
}