Patched file for corporatesource wp theme to properly use layouts. From corporatesource/inc/customizer/core/

customizer-core.php

<?php 
/**
 * Core functions.
 *
 * @package corporatesource
 */

if ( ! function_exists( 'corporatesource_get_option' ) ) :

        /**
         * Get theme option.
         *
         * @since 1.0.0
         *
         * @param string $key Option key.
         * @return mixed Option value.
         */
	function corporatesource_get_option( $key ) {

                if ( empty( $key ) ) {
                        return;
                }

                $value = '';

                $default = corporatesource_get_default_theme_options();
                $default_value = null;

                if ( is_array( $default ) && isset( $default[ $key ] ) ) {
                        $default_value = $default[ $key ];
                }

               	// handle page_layout key specially, since it doesn't get handled properly with get_theme_mod()
                if ($key == 'page_layout') {
                        $base_template = get_page_template_slug();

                       	// If not set, return default val
                        if(is_null($base_template) || strlen($base_template) == 0) {
                                return $default_value;
                        }

                        $prefix = "custom-template/";
                        $postfix = ".php";

                       	// If not a valid template (starting with $prefix and ending with $postfix, return default
                        if( substr($base_template, strlen($postfix) * -1) != $postfix ||  substr($base_template, 0, strlen($prefix)) != $prefix) {
                                return $default_value;
                        }
                       	// If all tests pass so far, remove prefix and postfix to get the template name, and return it:
                       	// Remove postfix, then prefix
                        $base_template = substr($base_template, 0, strlen($postfix) * -1);
                        $base_template = substr($base_template, strlen($prefix));

                        return $base_template;
                }


                if ( null !== $default_value ) {
                        $value = get_theme_mod( $key, $default_value );
                }
                else {
                      	$value = get_theme_mod( $key );
                }

                return $value;
        }

endif;