diff --git a/src/app/code/community/AvS/FastSimpleImport/Model/Import/Entity/Category.php b/src/app/code/community/AvS/FastSimpleImport/Model/Import/Entity/Category.php
index 489a9917..d12ed98d 100644
--- a/src/app/code/community/AvS/FastSimpleImport/Model/Import/Entity/Category.php
+++ b/src/app/code/community/AvS/FastSimpleImport/Model/Import/Entity/Category.php
@@ -194,6 +194,11 @@ class AvS_FastSimpleImport_Model_Import_Entity_Category extends Mage_ImportExpor
 
     protected $_defaultAttributeSetId = 0;
 
+    /**
+     * @var Mage_Catalog_Model_Resource_Category
+     */
+    protected $_categoryResource;
+
     public function setIgnoreDuplicates($ignore)
     {
         $this->_ignoreDuplicates = (boolean) $ignore;
@@ -256,6 +261,11 @@ public function __construct()
     {
         parent::__construct();
 
+        /* @var $categoryResource Mage_Catalog_Model_Resource_Category */
+        $categoryResource = Mage::getModel('catalog/category')->getResource();
+        $this->_categoryResource = $categoryResource;
+        $this->_entityTable   = $categoryResource->getEntityTable();
+
         $this
             ->_initOnTabAttributes()
             ->_initWebsites()
@@ -264,10 +274,6 @@ public function __construct()
             ->_initAttributes()
             ->_initAttributeSetId();
 
-        /* @var $categoryResource Mage_Catalog_Model_Resource_Category */
-        $categoryResource = Mage::getModel('catalog/category')->getResource();
-        $this->_entityTable   = $categoryResource->getEntityTable();
-
     }
 
     /**
@@ -375,12 +381,19 @@ protected function _initCategories()
                 }
                 $index = $this->_implodeEscaped('/', $path);
 
-                $this->_categoriesWithRoots[$rootCategoryName][$index] = array(
-                    'entity_id' => $category->getId(),
-                    'path' => $category->getPath(),
-                    'level' => $category->getLevel(),
-                    'position' => $category->getPosition()
-                );
+                $this->_categoriesWithRoots[$rootCategoryName][$index] =
+                    new Varien_Object(
+                        array(
+                            'entity_id' => $category->getId(),
+                            'path' => $category->getPath(),
+                            'level' => $category->getLevel(),
+                            'position' => $category->getPosition(),
+                            'next_child_position' =>
+                                $this->_getCategoryNextChildPosition(
+                                    $category->getPath()
+                                )
+                        )
+                    );
 
                 //allow importing by ids.
                 if (!isset($this->_categoriesWithRoots[$structure[1]])) {
@@ -394,6 +407,30 @@ protected function _initCategories()
         return $this;
     }
 
+    /**
+     * Get the position of a category's next child using the path of the
+     * category
+     *
+     * @param $path
+     * @return int
+     */
+    protected function _getCategoryNextChildPosition($path)
+    {
+        static $method;
+
+        if (is_null($method)) {
+            $class = new ReflectionClass(
+                'Mage_Catalog_Model_Resource_Category'
+            );
+
+            $method = $class->getMethod('_getMaxPosition');
+            $method->setAccessible(true);
+        }
+
+        $position = $method->invoke($this->_categoryResource, $path);
+        return $position + 1;
+    }
+
     /**
      * Initialize stores hash.
      *
@@ -474,35 +511,11 @@ protected function _prepareRowForDb(array $rowData)
 
         if (self::SCOPE_DEFAULT == $this->getRowScope($rowData)) {
             $rowData['name'] = $this->_getCategoryName($rowData);
-            $rowData['position'] = $this->_getCategoryPosition($rowData);
         }
 
         return $rowData;
     }
 
-    /**
-     * Populate position to prevent warning
-     * try to use existing value to prevent reordering during update
-     *
-     * @param $rowData
-     * @return int
-     */
-    protected function _getCategoryPosition($rowData)
-    {
-        if (isset($rowData['position'])) {
-            return $rowData['position'];
-        }
-
-        $position = 10000;
-        if (isset($rowData['_root']) && isset($rowData['_category'])
-            && isset($this->_categoriesWithRoots[$rowData['_root']][$rowData['_category']])
-        ) {
-            $position = $this->_categoriesWithRoots[$rowData['_root']][$rowData['_category']]['position'];
-        }
-        return $position;
-    }
-
-
     /**
      * Save category attributes.
      *
@@ -570,16 +583,28 @@ protected function _saveCategories()
                         'level'       => $parentCategory['level'] + 1,
                         'created_at'  => empty($rowData['created_at']) ? now()
                                 : gmstrftime($strftimeFormat, strtotime($rowData['created_at'])),
-                        'updated_at'  => now(),
-                        'position'    => $rowData['position']
+                        'updated_at'  => now()
                     );
 
                     if (isset($this->_categoriesWithRoots[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]]))
                     { //edit
 
                         $entityId = $this->_categoriesWithRoots[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]]['entity_id'];
+
+                        $path = $parentCategory['path'] . '/' . $entityId;
+                        $position = $this->_categoriesWithRoots[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]]['position'];
+
+                        if ($path !== $this->_categoriesWithRoots[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]]['path']
+                            && empty($rowData['position'])) {
+                            // category moved to a new parent
+                            $position = $parentCategory['next_child_position'];
+                            $parentCategory['next_child_position'] += 1;
+                            $this->_categoriesWithRoots[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]]['path'] = $path;
+                        }
+
                         $entityRow['entity_id']        = $entityId;
                         $entityRow['path']             = $parentCategory['path'] .'/'.$entityId;
+                        $entityRow['position']         = !empty($rowData['position']) ? $rowData['position'] : $position;
                         $entityRowsUp[]                = $entityRow;
                         $rowData['entity_id']          = $entityId;
                     } else
@@ -589,14 +614,25 @@ protected function _saveCategories()
                         $entityRow['path']             = $parentCategory['path'] .'/'.$entityId;
                         $entityRow['entity_type_id']   = $this->_entityTypeId;
                         $entityRow['attribute_set_id'] = $this->_defaultAttributeSetId;
-                        $entityRowsIn[]                = $entityRow;
 
-                        $this->_newCategory[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]] = array(
-                            'entity_id' => $entityId,
-                            'path' => $entityRow['path'],
-                            'level' => $entityRow['level']
-                        );
+                        if (!empty($rowData['position'])) {
+                            $entityRow['position'] = $rowData['position'];
+                        } else {
+                            $entityRow['position'] = $parentCategory['next_child_position'];
+                            $parentCategory['next_child_position'] += 1;
+                        }
+
+                        $entityRowsIn[]                = $entityRow;
 
+                        $this->_newCategory[$rowData[self::COL_ROOT]][$rowData[self::COL_CATEGORY]] =
+                            new Varien_Object(
+                                array(
+                                    'entity_id' => $entityId,
+                                    'path' => $entityRow['path'],
+                                    'level' => $entityRow['level'],
+                                    'next_child_position' => 1
+                                )
+                            );
                     }
                 }
 
diff --git a/src/app/code/community/AvS/FastSimpleImport/Test/Model/Category/MainTest.php b/src/app/code/community/AvS/FastSimpleImport/Test/Model/Category/MainTest.php
index 43160bb0..b323a54c 100644
--- a/src/app/code/community/AvS/FastSimpleImport/Test/Model/Category/MainTest.php
+++ b/src/app/code/community/AvS/FastSimpleImport/Test/Model/Category/MainTest.php
@@ -33,6 +33,19 @@ public function createCategoryTree($values)
         $this->assertNotNull($baseCategory);
         $this->assertEquals(count($values), $baseCategory->getChildrenCount());
 
+        // Assert positions
+        /** @var Mage_Catalog_Model_Category $categoryModel */
+        $categoryModel = Mage::getModel('catalog/category');
+        $topLevel = $categoryModel->loadByAttribute('name', 'Test2');
+        $firstChild = $categoryModel->loadByAttribute('name', 'TestTest');
+        $secondChild = $categoryModel->loadByAttribute(
+            'name',
+            'Test4 / WithSlash'
+        );
+
+        $this->assertEquals(1, $topLevel->getPosition());
+        $this->assertEquals(1, $firstChild->getPosition());
+        $this->assertEquals(2, $secondChild->getPosition());
     }
 
     /**