Fixed calculation bug with range upload stats

oscar/apps/dashboard/ranges/models.py

         found_skus = set(products.values_list('stockrecord__partner_sku', flat=True))
         found_upcs = set(products.values_list('upc', flat=True))
         found_ids = found_skus.union(found_upcs)
-        missing_skus = new_ids - found_ids
-        dupes = set(all_ids).intersection(existing_skus)
+        missing_ids = new_ids - found_ids
+        dupes = set(all_ids).intersection(existing_ids)
 
-        self.mark_as_processed(len(found_skus), len(missing_skus), len(dupes))
+        self.mark_as_processed(len(found_ids), len(missing_ids), len(dupes))
 
     def extract_ids(self):
         """

oscar/templates/dashboard/ranges/range_product_list.html

 				<tr>
 					<th>Filename</th>
 					<th>New products</th>
-					<th>Dupliate products</th>
+					<th>Duplicate products</th>
 					<th>Unknown products</th>
 					<th>Date uploaded</th>
 				</tr>
 				<tr>
 					<td>{{ upload.filename }}</td>
 					<td>{{ upload.num_new_skus }}</td>
-					<td>{{ upload.num_unknown_skus }}</td>
 					<td>{{ upload.num_duplicate_skus }}</td>
+					<td>{{ upload.num_unknown_skus }}</td>
 					<td>{{ upload.date_uploaded }}</td>
 				</tr>
 				{% endfor %}