diff --git a/addons/nodequeue_rules/nodequeue_rules.rules.inc b/addons/nodequeue_rules/nodequeue_rules.rules.inc
index 5d2368f..69b744d 100644
--- a/addons/nodequeue_rules/nodequeue_rules.rules.inc
+++ b/addons/nodequeue_rules/nodequeue_rules.rules.inc
@@ -102,6 +102,12 @@ function nodequeue_rules_rules_action_info() {
           'description' => t('The queue where the node should be added to.'),
           'options list' => 'nodequeue_rules_get_queue_names',
         ),
+        'unique' => array(
+          'type' => 'boolean',
+          'label' => t('Prevent duplication'),
+          'description' => t('Selecting this option will prevent the node from being added more than once to any subqueue.'),
+          'default value' => TRUE,
+        )
       ),
     ),
     // Action: Remove the given node from the given nodequeue.
@@ -128,7 +134,7 @@ function nodequeue_rules_rules_action_info() {
 /**
  * Action: Add the given node to the given nodequeue.
  */
-function nodequeue_rules_action_add_node($node, $queue_name) {
+function nodequeue_rules_action_add_node($node, $queue_name, $unique) {
   $queue = nodequeue_load_queue_by_name($queue_name);
   $smartqueue_enabled = function_exists('smartqueue_taxonomy_nodequeue_subqueues') ? TRUE : FALSE;
   if ($smartqueue_enabled) {
@@ -136,14 +142,21 @@ function nodequeue_rules_action_add_node($node, $queue_name) {
   }
   $subqueues = nodequeue_load_subqueues_by_queue($queue->qid);
   foreach($subqueues as $subqueue) {
-    if ($smartqueue_enabled) {
-      if (in_array($subqueue->reference, $references)) {
+    $add = TRUE;
+    // unique means we don't add it if it's in the queue already
+    if ($unique) {
+      $add = nodequeue_subqueue_position($subqueue->sqid, $node->nid) === FALSE;
+    }
+    if ($add) {
+      if ($smartqueue_enabled) {
+        if (in_array($subqueue->reference, $references)) {
+          nodequeue_subqueue_add($queue, $subqueue, $node->nid);
+        }
+      }
+      else {
         nodequeue_subqueue_add($queue, $subqueue, $node->nid);
       }
     }
-    else {
-      nodequeue_subqueue_add($queue, $subqueue, $node->nid);
-    }
   }
 }
 
@@ -152,9 +165,11 @@ function nodequeue_rules_action_add_node($node, $queue_name) {
  */
 function nodequeue_rules_action_remove_node($node, $queue_name) {
   $queue = nodequeue_load_queue_by_name($queue_name);
-  $subqueue = array_shift(nodequeue_load_subqueues_by_queue($queue->qid));
-  if (!$queue->i18n || (isset($node->tnid) && empty($node->tnid))) {
-    nodequeue_subqueue_remove_node($subqueue->qid, $node->nid);
+  $subqueues = nodequeue_load_subqueues_by_queue($queue->qid);
+  foreach ($subqueues as $subqueue) {
+    if (!$queue->i18n || (isset($node->tnid) && empty($node->tnid))) {
+      nodequeue_subqueue_remove_node($subqueue->sqid, $node->nid);
+    }
   }
 }