Media Mail restriction mod to new, 3-7-14 usps module, any help?

[buildingblocks]

ok, I will worry about the sub sub cats in a bit

To start I have added:

// see below use of $chk_cart
// eof: example to block USPS Priority MailTM Small Flat Rate Box when anything from master_categories_id 12 or 15 are in the cart

// bof: skip Products in any subcategory for parents_id 486
      $subcategories_array = array();
      $chk_cat = '486'; // parent categories_id
      $chk_cart = 0;
      zen_get_subcategories($subcategories_array, $chk_cat);
      for ($i=0, $n=sizeof($subcategories_array); $i<$n; $i++ ) {
        $chk_cart += $_SESSION['cart']->in_cart_check('master_categories_id', $subcategories_array[$i]);
      }
//echo 'USPS products in parent category 486: ' . $chk_cart . '<br>';
// eof: skip Products in any subcategory for parents_id 486
      for ($i=0; $i<$PackageSize; $i++) { 

I also have this code in place

$show_hiddenCost = '';
// bof: test contents for Media Mail
          if ($type == 'Media Mail Parcel' && $skip_media) {
            // skip Media Mail
          } else {
          $methods[] = array('id' => $type_rebuilt,
                             'title' => $title . $show_hiddenCost,
                             'cost' => $cost,
                            );
          }
// eof: test contents for Media Mail
        } else {
         { 

When I add a non media item, media mail is still offered. When I add a book from a sub cat and a non media item, media mail is still offered. Have I done something wrong? Should I be combining the code with what was posted in post #4?