无法按类别获取产品，只能获取最后添加的产品

我创建了一个查询，其中产品是按产品子类别名称或产品标签获取的，但主要问题是，我只获取最后输入的产品。有人能帮我解决问题吗？请告诉我我做错了什么，我做错了什么。

<?php 
if(isset($_POST[\'step_03\'])) {
    $que_01 = $_POST[\'que_01\'];
    $que_02 = $_POST[\'que_02\'];
    $que_03 = $_POST[\'que_03\'];
    $subcat = array("$que_01", "$que_02", "$que_03");

    $args = array( 
        \'post_type\'      => \'product\', 
        \'posts_per_page\' => 1, 
        \'product_tag\'    => $que_01 
    );
} else {
    if(isset($_POST[\'cat\'])) {
        $tags = $_POST[\'cat\'];
    }
    $args = array( 
        \'post_type\'      => \'product\', 
        \'posts_per_page\' => 1, 
        \'product_category\'   => $tags 
    );
}
$loop = new WP_Query( $args );
$product_count = $loop->post_count;
if( $product_count > 0 ) :
    while ( $loop->have_posts() ) : $loop->the_post(); 
        global $post;
        echo $thePostID = $loop->post->post_title;
            }
endif;
?>

<?php if(isset($_POST[\'step_03\'])) { $que_01 = $_POST[\'que_01\']; $que_02 = $_POST[\'que_02\']; $que_03 = $_POST[\'que_03\']; $subcat = array("$que_01", "$que_02", "$que_03"); $args = array( \'post_type\' => \'product\', \'posts_per_page\' => -1, \'product_tag\' => $que_01 ); } else { if(isset($_POST[\'cat\'])) { $tags = $_POST[\'cat\']; } $args = array( \'post_type\' => \'product\', \'posts_per_page\' => -1, \'product_category\' => $tags ); } $loop = new WP_Query( $args ); $product_count = $loop->post_count; if( $product_count > 0 ) : while ( $loop->have_posts() ) : $loop->the_post(); global $post; echo $thePostID = $loop->post->post_title; } endif; ?>

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