FWP Customization - Sort not working

<?php

/**
*
* FacetWP Modifications
*
**/

/*=====================================================
=            CAF Settings Scrolltop option            =
=====================================================*/

add_action('wp_head', 'caf_fwp_scrolltop_js');
function caf_fwp_scrolltop_js(){
    $CAF_Settings = get_option('CAF_Settings', array());

    if( $CAF_Settings['opt-caf-fwp-scrolltop-refresh']){
        echo '<script type="text/javascript">var CAF_FWP_scrolltop = true;</script>';
    } else{
        echo '<script type="text/javascript">var CAF_FWP_scrolltop = false;</script>';
    }

}

/*===========================================
=            Altering Pager Text            =
===========================================*/

add_filter( 'facetwp_pager_html', 'caf_facetwp_pager_html', 10, 2 );
function caf_facetwp_pager_html( $output, $params ) {
    global $CAF_Settings;

    if( $first_text = $CAF_Settings['opt-caf-fwp-pager-first-text'])
        $output = str_replace('&lt;&lt;', $first_text, $output);

    if( $last_text = $CAF_Settings['opt-caf-fwp-pager-last-text'])
        $output = str_replace('&gt;&gt;', $last_text, $output);

    return $output;
}

/*==============================================================
=            Alter Sort Results, Add Items Per Page            =
==============================================================*/

//add_filter( 'facetwp_sort_html', 'caf_facetwp_sort_html', 10, 2 );
function caf_facetwp_sort_html( $html, $params ) {
    global $CAF_Settings;

    $html = '<select class="facetwp-sort-select">';
    foreach ( $params['sort_options'] as $key => $atts ) {
        $html .= '<option value="' . $key . '">' . $atts['label'] . '</option>';
    }
    $html .= '</select>';

    return $html;
}

/*=======================================================
=            Custom Items Per Page Shortcode            =
=======================================================*/
add_shortcode( 'caf_facetwp','caf_facetwp_custom' );
function caf_facetwp_custom( $atts ) {
    global $CAF_Settings;
    $html = '';

    $atts = extract( shortcode_atts( array(
        'itemsperpage'=>false
    ),$atts ) );


    if( $itemsperpage){
        $html .= '<div class="facetwp-itemsperpage caf-facetwp"><select class="caf-fwp-items-per-page">';
        foreach($CAF_Settings['opt-caf-fwp-items-per-page'] as $item){
            $val = explode(':', $item);
            $label = isset($val[1]) ? $val[1] : $val[0];
            $html .= '<option value="'.$val[0].'">'.$label.'</option>';
        }
        $html .= '</select></div>';
    }

    return $html;
    // do shortcode actions here
}

/*=============================================
=            Altering Sort Options            =
=============================================*/
/*
These fields are JSON-encoded and entered in the Redux Options framework
{"price_desc": { "label": "Price (Lowest)", "query_args": { "orderby": "meta_value_num", "meta_key":"caf_regular_price", "order": "DESC" } } }
{"price_asc": { "label": "Price (Highest)", "query_args": { "orderby": "meta_value_num", "meta_key":"caf_regular_price", "order": "ASC" } } }
{"year_desc": { "label": "Year (Oldest)", "query_args": { "orderby": "meta_value", "meta_key":"caf_year", "order": "DESC" } } }
{"year_asc": { "label": "Year (Newest)", "query_args": { "orderby": "meta_value", "meta_key":"caf_year", "order": "ASC" } } }
*/

add_filter( 'facetwp_sort_options', 'caf_facetwp_sort_options', 10, 2 );
function caf_facetwp_sort_options( $options, $params ) {
    global $CAF_Settings;

    if( !empty($CAF_Settings['opt-caf-fwp-sort-options'])){
        $options = array();

        foreach($CAF_Settings['opt-caf-fwp-sort-options'] as $opt){
            if( $option = json_decode($opt, true) ){

                // Get first key of object
                $keys = array_keys($option);

                // Add to options array
                $options[$keys[0]] = $option[$keys[0]];

            } // if decode successful

        } // foreach search option
    } // if search options set

    echo '<pre style="height:120px;overflow-y:scroll;resize:both;">facetwp_sort_options(): $options = '.print_r($options, true).'</pre>';
    return $options;
}

/*======================================================
=            Alter Query for Items per Page            =
======================================================*/

add_filter( 'facetwp_query_args', 'caf_facetwp_query_args', 10, 2 );
function caf_facetwp_query_args( $query_args, $class ) {
    if ( isset( $class->http_params['per_page'] ) ) {
        $query_args['posts_per_page'] = (int) $class->http_params['per_page'];
    }
    echo '<pre style="height:120px;overflow-y:scroll;resize:both;">facetwp_query_args(): $query_args = '.print_r($query_args, true).'</pre>';
    return $query_args;
}