diff --git a/app/models/mongoid/sortable.rb b/app/models/mongoid/sortable.rb
index 1e7302b8b..16a69defb 100644
--- a/app/models/mongoid/sortable.rb
+++ b/app/models/mongoid/sortable.rb
@@ -21,7 +21,7 @@ module Mongoid
     private
 
     def set_sort_number
-      if self.sort_number.nil?
+      if self.new? && self.sort_number.nil?
         last_record = self.class.desc(:sort_number).first
         if last_record
           self.sort_number = (last_record.sort_number + 10) / 10 * 10
diff --git a/vendor/built_in_modules/archive/app/models/archive_file_multiple.rb b/vendor/built_in_modules/archive/app/models/archive_file_multiple.rb
index 9dc833632..d45d34a82 100644
--- a/vendor/built_in_modules/archive/app/models/archive_file_multiple.rb
+++ b/vendor/built_in_modules/archive/app/models/archive_file_multiple.rb
@@ -2,23 +2,26 @@ class ArchiveFileMultiple
 
   include Mongoid::Document
   include Mongoid::Timestamps
+  include Mongoid::Sortable
 
   mount_uploader :file, AssetUploader
-  
+
   field :file_title, localize: true
   # field :description
   field :choose_lang, :type => Array, :default => nil
-  
+
   field :should_destroy, :type => Boolean
 
+  default_scope asc(:sort_number)
+
   def choose_lang_display(lang)
     self.choose_lang.include?(lang)
   end
-  
+
   belongs_to :archive_file
-  
+
   # has_many :archive_file_multiple_langs, :autosave => true, :dependent => :destroy
-  
+
   # accepts_nested_attributes_for :archive_file_multiple_langs, :allow_destroy => true
-  
+
 end
diff --git a/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form.html.erb b/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form.html.erb
index 01bd76e07..318ba6b51 100644
--- a/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form.html.erb
+++ b/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form.html.erb
@@ -82,6 +82,7 @@
 				<table class="table table-condensed">
 					<thead>
 						<tr>
+              <th>排序數</th>
 							<th>File</th>
 							<th>File Name</th>
 							<th class="span2"><%= t('呈現語系')%></th>
@@ -137,7 +138,9 @@
 			var new_id = $(this).prev().attr('value');
 			var old_id = new RegExp("new_archive_file_multiples", "g");
 			$(this).prev().attr('value', parseInt(new_id) + 1);
-			$(this).parents('table').append(("<%= escape_javascript(add_attribute 'form_file', f, :archive_file_multiples) %>").replace(old_id, new_id));
+      var new_form_file = $("<%= escape_javascript(add_attribute 'form_file', f, :archive_file_multiples) %>".replace(old_id, new_id));
+      new_form_file.find('input#archive_file_archive_file_multiples_attributes_'+new_id+'_sort_number').val(new_id * 10)
+			$(this).parents('table').append(new_form_file);
 		});
 
 		$('.archive_file_multiples_block a.delete').live('click', function(){
diff --git a/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form_file.html.erb b/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form_file.html.erb
index f2c11f063..52f776668 100644
--- a/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form_file.html.erb
+++ b/vendor/built_in_modules/archive/app/views/panel/archive/back_end/archive_files/_form_file.html.erb
@@ -1,6 +1,13 @@
 <% # encoding: utf-8 %>
 
 		<tr id="<%= "archive_file_multiple_#{form_file.id}" if !form_file.new_record? %>" class='list_item'>
+      <td>
+        <div class="control-group">
+          <div class="controls">
+            <%= f.text_field :sort_number %>
+          </div>
+        </div>
+      </td>
 			<td>
 				<div class="control-group">
 					<div class="controls">
@@ -8,13 +15,13 @@
 					<%= form_file.file.file ? ( link_to t(:view), form_file.file.url, {:class => 'btn', :target => '_blank', :title => t(:view)} ) : '' %>
 					</div>
 				</div>
-			</td>	
-			<td>	
-			
+			</td>
+			<td>
+
 				<div class="tab-content">
-				
+
 					<% @site_valid_locales.each_with_index do |locale, i| %>
-					
+
 					<div class="<%= locale %> fade tab-pane <%= ( i == 0 ) ? "in active" : '' %>">
 						<%#= f.fields_for :i18n_variable, (form_file.new_record? ? form_file.build_i18n_variable : form_file.i18n_variable ) do |f| %>
 						<%= f.fields_for :file_title_translations do |f| %>
@@ -24,14 +31,14 @@
 							<%= f.text_field locale, :class=>'post-file_title', :value => (form_file.file_title_translations[locale] rescue nil) %>
 							</div>
 							</div>
-						<% end %>	
-						
+						<% end %>
+
 					</div>
 
 					<% end %>
-					
+
 				</div>
-				
+
 			</td>
 			<td>
 				<% @site_valid_locales.each do |locale| %>
@@ -40,18 +47,18 @@
 				<% end %>
 				<%= hidden_field_tag 'archive_file[archive_file_multiples_attributes][0][choose_lang][]', '' %>
 			</td>
-			
+
 			<td>
 			<span class="action">
 			<% if form_file.new_record? %>
 			  <a class="delete"><i class="icon-remove"></i></a>
-			<% else %>	
+			<% else %>
 			  <%= f.hidden_field :id %>
 			  <a class="remove_existing_record"><i class="icon-remove"></i></a>
 			  <%= f.hidden_field :should_destroy, :value => nil, :class => 'should_destroy' %>
 			<% end %>
 			</span>
-			
+
 			</td>
 		</tr>
-		
+