New version

Finally I can solve,

Point 2 is because search bar on taxonomy page dont send the catid, I modify as show line 119: search-bar.php
Old line
<?php if(!isset($_GET[‘catid’])){ $selcat = “”; }else{ $selcat = $_GET[‘catid’]; } echo $CORE->CategoryList(array($selcat,false,0,THEME_TAXONOMY)); ?>
New line:
<?php if(!isset($_GET[‘catid’])){ $selcat = “”; } else { $selcat = $_GET[‘catid’]; } if (is_tax()){ $selcat = get_queried_object_id(); } echo $CORE->CategoryList(array($selcat,false,0,THEME_TAXONOMY)); ?>

In this way, search form show current category as selected, and when someone try to order or filter, only show products on current page

and point 1, for default search, i modify search-results.php after before hook to force my order in a taxonomy pages:

if(is_tax()) {
global $wp_query;
if ($post->post_type == ‘listing_type’){
$custom_query_args = array(
‘meta_key’ => ‘price’,
‘orderby’ => ‘meta_value_num’,
‘order’ => ‘asc’
);
$args = array_merge( $wp_query->query, $custom_query_args );

query_posts( $args );
}
}

Thanks a lot mark, but solved for me. I show this changes because maybe are intersting for your next releases.