Search result page problem

Hi there,
i have problems with my search result page.
In Ajax search pro the sroting of products is okay it does sort the products _price ASC.

But on the search result page the products are not sorted by _price. it is random.
Any help how i can archive the sorting on search page too? (should also be _price ASC).
i treid this code but then it does not respect the search terms and i get more products then searched (eg when i search blue shirt it shows all prodiucts with blue OR shirt. it should be blue AND shirt)

function custom_woocommerce_get_catalog_ordering_args( $args ) {
    if ( is_search() ) {
        $args['orderby'] = 'meta_value_num';
        $args['order'] = 'ASC';
        $args['meta_key'] = '_price';
    }
    return $args;
}
add_filter( 'woocommerce_get_catalog_ordering_args', 'custom_woocommerce_get_catalog_ordering_args' );

function custom_search_order_by_price( $clauses, $query ) {
    global $wpdb;
    if ( ! is_admin() && $query->is_main_query() && $query->is_search() ) {
        if ( strpos( $clauses['join'], 'pm.meta_key = \'_price\'' ) === false ) {
            $clauses['join'] .= " LEFT JOIN {$wpdb->postmeta} AS pm ON {$wpdb->posts}.ID = pm.post_id ";
        }
        $clauses['where'] .= " AND pm.meta_key = '_price' ";
        $clauses['orderby'] = " CAST(pm.meta_value AS DECIMAL) ASC ";
    }
    return $clauses;
}
add_filter( 'posts_clauses', 'custom_search_order_by_price', 10, 2 );

thanks for oyur help