https://www.drupal.org/node/2026321 Patch to remove "You are not authorized to access this command."

commerce_shipping-remove_not_authorized_error-2026321.patch

diff --git a/includes/commerce_shipping.checkout_pane.inc b/includes/commerce_shipping.checkout_pane.inc
index fed4752..8c61552 100644
--- a/includes/commerce_shipping.checkout_pane.inc
+++ b/includes/commerce_shipping.checkout_pane.inc
@@ -178,17 +178,12 @@ function commerce_shipping_recalculate_services_refresh($form, $form_state) {
  * Validate callback for recalculating shipping services.
  */
 function commerce_shipping_recalculate_services_validate($form, &$form_state) {
-
-  // Load latest version of the order.
-  $order = commerce_order_load($form_state['order']->order_id);
   // Check if the order is still on the same checkout step.
   $checkout_page = $form_state['checkout_page'];
-  if ($form_state['order']->changed < $order->changed || !commerce_checkout_page_access($checkout_page, $order)) {
-    // Clear all errors.
-    form_clear_error();
-    watchdog('access denied', check_plain($_GET['q']), NULL, WATCHDOG_WARNING);
-    drupal_set_message(t('You are not authorized to access this command.'), 'error');
-    $form_state['rebuild'] = TRUE;
+
+  // Don't attempt to recalculate shipping if the order object has changed
+  // or access to the current checkout page is prohibited.
+  if (commerce_order_has_changed($form_state['order']) || !commerce_checkout_page_access($checkout_page, $form_state['order'])) {
     return FALSE;
   }