what error in my CPT and Template ?

Hi this is CPT with custom fields.

<?php
add_action('init', 'wlg_cstm_register');  

 function wlg_cstm_register() {  

	$product_labels = array(
    'name' => _x('Products', 'post type general name'),
    'singular_name' => _x('product', 'post type singular name'),
    'add_new' => _x('Add New', 'product'),
    'add_new_item' => __('Add New Products'),
    'edit_item' => __('Edit Products'),
    'new_item' => __('New product'),
    'view_item' => __('View Products'),
    'search_items' => __('Search Products'),
    'not_found' =>  __('No Products found'),
    'not_found_in_trash' => __('No Products found in Trash'),
    'parent_item_colon' => ''
);

	$product_args = array(
         'labels' => $product_labels,
         'public' => true,
         'show_ui' => true,
         'capability_type' => 'post',
         'hierarchical' => false,
         'rewrite' => true,
         'supports' => array('title', 'editor', 'thumbnail'),
		'taxonomies' => array( '' ),
        'menu_icon' => get_bloginfo('template_directory') . '/images/products-icon.png',  // Icon Path
        'has_archive' => true
        );

     register_post_type( 'product' , $product_args );
	 register_taxonomy( 'brands', 'product', array( 'hierarchical' => true, 'label' => __('Product Brands'), 'query_var' => 'brands' ) );
 }

 add_action("admin_init", "admin_init");
add_action('save_post', 'save_points', 1, 2);
function admin_init(){
  add_meta_box("productInfo-meta", "Product Details", "product_meta_options", 'product', "normal", "high");
}

function product_meta_options(){
  global $post;
  $custom = get_post_custom($post->ID);
  $category = (!empty($custom["_category"][0])) ? $custom["_category"][0] : '';
  $brand = (!empty($custom["_brand"][0])) ? $custom["_brand"][0]  : '';
  $id = (!empty($custom["_productid"][0])) ? $custom["_productid"][0] : '';
  $features = (!empty($custom["_features"][0])) ? $custom["_features"][0]  : '';
  $holds = (!empty($custom["_holds"][0])) ? $custom["_holds"][0]  : '';
?>
<table>
    <tr>
        <td>Category</td>
        <td> <input type="text" size="100" name="category" value="<?php echo $category; ?>" /> </td>
    </tr>
    <tr>
        <td>Brand</td>
        <td> <input type="text" size="100" name="brand" value="<?php echo $brand; ?>" /> </td>
    </tr>
	<tr>
        <td>Product ID</td>
        <td> <input type="text" size="100" name="productid" value="<?php echo $productid; ?>" /> </td>
    </tr>
    <tr>
        <td>Features</td>
        <td><?php wp_editor( $features, 'features', $settings = array('textarea_rows'=>20) ); ?></td>
    </tr>
    <tr>
        <td>Holds</td>
        <td><?php wp_editor( $holds, 'holds', $settings = array('textarea_rows'=>20) ); ?></td>
    </tr>
</table>

<?php
}

function save_points($postid,$post){
  global $_POST;
  // set the ID to the parent post, not the revision
  $postid = (wp_is_post_revision( $postid )) ? wp_is_post_revision( $post ) : $postid;
  $post_type = get_post_type( $postid );
  if ('product' == $post_type) {
    update_post_meta($postid, "_category", $_POST["category"]);
    update_post_meta($postid, "_brand", $_POST["brand"]);
	update_post_meta($postid, "_productid", $_POST["productid"]);
    update_post_meta($postid, "_features", $_POST["features"]);
    update_post_meta($postid, "_holds", $_POST["holds"]); // save the data
  }
}

function todo_restrict_manage_posts() {
    global $typenow;
    $args=array( 'public' => true, '_builtin' => false );
    $post_types = get_post_types($args);
    if ( in_array($typenow, $post_types) ) {
    $filters = get_object_taxonomies($typenow);
        foreach ($filters as $tax_slug) {
            $tax_obj = get_taxonomy($tax_slug);
            wp_dropdown_categories(array(
                'show_option_all' => __('Show All '.$tax_obj->label ),
                'taxonomy' => $tax_slug,
                'name' => $tax_obj->name,
                'orderby' => 'term_order',
                'selected' => $_GET[$tax_obj->query_var],
                'hierarchical' => $tax_obj->hierarchical,
                'show_count' => false,
                'hide_empty' => true
            ));
        }
    }
}
function todo_convert_restrict($query) {
    global $pagenow;
    global $typenow;
    if ($pagenow=='edit.php') {
        $filters = get_object_taxonomies($typenow);
        foreach ($filters as $tax_slug) {
            $var = &$query->query_vars[$tax_slug];
            if ( isset($var) ) {
                $term = get_term_by('id',$var,$tax_slug);
                $var = $term->slug;
            }
        }
    }
    return $query;
}
add_action( 'restrict_manage_posts', 'todo_restrict_manage_posts' );
add_filter('parse_query','todo_convert_restrict');

add_filter( 'manage_edit-product_columns', 'my_columns' );
function my_columns( $columns ) {
    $columns['brands'] = 'Brands';
    $columns['category'] = 'Category';
    unset( $columns['comments'] );
    return $columns;
}
add_action( 'manage_posts_custom_column', 'populate_columns' );
function populate_columns( $column ) {
    if ( 'brands' == $column ) {
        $brand = esc_html( get_post_meta( get_the_ID(), 'brand', true ) );
        echo $brand;
    }
    elseif ( 'category' == $column ) {
        $category = get_post_meta( get_the_ID(), 'category', true );
        echo $category;
    }
}

page template code

<?php
$wp_querty = new WP_Query( array(
	'post_type'    => 'product', 'post_status'  => 'publish') ); ?>
<?php if ( have_posts() ) : while ( have_posts() ) : the_post(); ?>

<?php the_post_thumbnail(); ?>
<?php echo esc_html( get_post_meta( get_the_ID(), 'category', true ) ); ?>
<?php echo esc_html( get_post_meta( get_the_ID(), 'brand', true ) ); ?>
<?php echo esc_html( get_post_meta( get_the_ID(), 'productid', true ) ); ?>
<?php the_content();?>
<?php echo apply_filters('the_content', get_post_meta($post->ID, 'features', true)); ?>
<?php echo get_post_meta( $post->ID, 'holds', true ); ?>

<?php endwhile; else: ?>
<?php endif; ?>

here productid field not saving data others saving correctly. and all custom fields not showing content in the page. the editor and title only showing content.
please help me to clear this issue.