diff --git a/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php b/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php
index 4e7f32d..aa1b696 100644
--- a/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php
+++ b/core/modules/views/lib/Drupal/views/Tests/UI/DisplayTest.php
@@ -127,8 +127,8 @@ public function testReorderDisplay() {
 
     // Put the block display in front of the page display.
     $edit = array(
-      'page_1[weight]' => 2,
-      'block_1[weight]' => 1
+      'displays[page_1][weight]' => 2,
+      'displays[block_1][weight]' => 1
     );
     $this->drupalPost(NULL, $edit, t('Apply'));
     $this->drupalPost(NULL, array(), t('Save'));
diff --git a/core/modules/views/views_ui/lib/Drupal/views_ui/Form/Ajax/ReorderDisplays.php b/core/modules/views/views_ui/lib/Drupal/views_ui/Form/Ajax/ReorderDisplays.php
index 588b1ee..e12bc7f 100644
--- a/core/modules/views/views_ui/lib/Drupal/views_ui/Form/Ajax/ReorderDisplays.php
+++ b/core/modules/views/views_ui/lib/Drupal/views_ui/Form/Ajax/ReorderDisplays.php
@@ -143,26 +143,29 @@ public function submitForm(array &$form, array &$form_state) {
     // Sort the order array
     asort($order);
 
-    // Fixing up positions
+    // Remove the default display from ordering.
+    unset($order['default']);
+    // Increment up positions.
     $position = 1;
 
     foreach (array_keys($order) as $display) {
-      $order[$display] = $position++;
+      $order[$display] = $position;
+      $position++;
     }
 
     // Setting up position and removing deleted displays
     $displays = $view->get('display');
-    foreach ($displays as $display_id => $display) {
+    foreach ($displays as $display_id => &$display) {
       // Don't touch the default !!!
       if ($display_id === 'default') {
-        $displays[$display_id]['position'] = 0;
+        $display['position'] = 0;
         continue;
       }
       if (isset($order[$display_id])) {
-        $displays[$display_id]['position'] = $order[$display_id];
+        $display['position'] = $order[$display_id];
       }
       else {
-        $displays[$display_id]['deleted'] = TRUE;
+        $display['deleted'] = TRUE;
       }
     }
     $view->set('display', $displays);