diff --git a/component/site/models/category.php b/component/site/models/category.php
index 781457060fe..6d9b2bf71ac 100644
--- a/component/site/models/category.php
+++ b/component/site/models/category.php
@@ -798,29 +798,11 @@ protected function populateState($ordering = '', $direction = '')
             $selectedTemplate,
             'int'
         );
-        $this->setState('category_template', $categoryTemplate);
-
-        if ($_POST) {
-            $manufacturerId = $app->input->post->getInt('manufacturer_id', 0);
-
-            if ($manufacturerId != $app->getUserState(
-                    $this->context . '.manufacturer_id',
-                    $app->input->get->getInt('manufacturer_id', 0)
-                )) {
-                $app->redirect(
-                    Redshop\IO\Route::_(
-                        'index.php?option=com_redshop&view=category&layout=' . $layout . '&cid=' . $this->_id . '&manufacturer_id=' . $manufacturerId
-                        . '&Itemid=' . $app->input->getInt('Itemid', 0),
-                        true
-                    )
-                );
-            }
-        } else {
-            $manufacturerId = $app->input->getInt('manufacturer_id', 0);
-            $app->setUserState($this->context . '.manufacturer_id', $manufacturerId);
-        }
 
         $categoryId = $app->input->post->getInt('category_id', 0);
+        $manufacturerId = $app->input->getInt('manufacturer_id', 0);
+
+        $this->setState('category_template', $categoryTemplate);
         $this->setState('category_id', $categoryId);
         $this->setState('manufacturer_id', $manufacturerId);
 
diff --git a/component/site/models/manufacturers.php b/component/site/models/manufacturers.php
index f92146830a1..234423f781f 100644
--- a/component/site/models/manufacturers.php
+++ b/component/site/models/manufacturers.php
@@ -244,10 +244,59 @@ public function getManufacturerProducts($template_data = '')
         $limitstart     = JFactory::getApplication()->input->getInt('limitstart', 0);
         $query          = $this->_buildProductQuery($template_data);
         $this->products = $this->_getList($query, $limitstart, $limit);
+        $countProduct   = count($this->products);
+        $orderBy = $this->_buildProductOrderBy();
+
+        if (strpos($orderBy, "p.product_price ASC") !== false) {
+            for ($i = 0; $i < $countProduct; $i++) {
+                $productPrices = RedshopHelperProductPrice::getNetPrice($this->products[$i]->product_id);
+
+                $this->products[$i]->productPrice = $productPrices['product_price'];
+            }
+
+            $this->products = $this->columnSort($this->products, 'productPrice', 'ASC');
+        } elseif (strpos($orderBy, "p.product_price DESC") !== false) {
+            for ($i = 0; $i < $countProduct; $i++) {
+                $productPrices = RedshopHelperProductPrice::getNetPrice($this->products[$i]->product_id);
+
+                $this->products[$i]->productPrice = $productPrices['product_price'];
+            }
+
+            $this->products = $this->columnSort($this->products, 'productPrice', 'DESC');
+        }
 
         return $this->products;
     }
 
+    public function columnSort($unsorted, $column, $sort)
+    {
+        $sorted = $unsorted;
+
+        if ($sort == "ASC") {
+            for ($i = 0; $i < count($sorted) - 1; $i++) {
+                for ($j = 0; $j < count($sorted) - 1 - $i; $j++) {
+                    if ($sorted[$j]->$column > $sorted[$j + 1]->$column) {
+                        $tmp            = $sorted[$j];
+                        $sorted[$j]     = $sorted[$j + 1];
+                        $sorted[$j + 1] = $tmp;
+                    }
+                }
+            }
+        } else {
+            for ($i = 0; $i < count($sorted) - 1; $i++) {
+                for ($j = 0; $j < count($sorted) - 1 - $i; $j++) {
+                    if ($sorted[$j]->$column < $sorted[$j + 1]->$column) {
+                        $tmp            = $sorted[$j];
+                        $sorted[$j]     = $sorted[$j + 1];
+                        $sorted[$j + 1] = $tmp;
+                    }
+                }
+            }
+        }
+
+        return $sorted;
+    }
+
     public function getProductLimit()
     {
         return $this->_productlimit;
@@ -299,7 +348,7 @@ public function _buildProductQuery($template_data = '')
             $query->where($db->qn('p.manufacturer_id') . ' IN (' . $shopperGroupManufactures . ')');
         }
 
-        if ($filterBy != '0') {
+        if (!empty($filterBy)) {
             $query->where($db->qn('c.id') . ' = ' . $db->q((int)$filterBy));
         }