title: Display tag table header column disappear
body: <p>I have a display tag table.</p>
  
  <pre><code>        &lt;display:table class="displayTable" id="ItemList"
              name="${sessionScope.List}" requestURI="listItem.action"
              pagesize="15" defaultsort="2" defaultorder="ascending" sort="list" &gt;
              &lt;display:column class="colID"&gt;
                  &lt;input type="checkbox" id="checked"
                      value="${ItemList.itemId}" /&gt;
              &lt;/display:column&gt;
              &lt;display:column class="colItemName" property="itemName"
                  title="${titleItemName}" sortable="true" headerClass="sortable" 
              /&gt;
              &lt;display:column property="categoryName"
                  title="${titleCategory}" sortable="true" headerClass="sortable" /&gt;
          &lt;/display:table&gt;
  </code></pre>
  
  <p>which will create like the below HTML.</p>
  
  <pre><code>&lt;table id="itemList" class="displayTable"&gt;
  &lt;thead&gt;
  &lt;tr&gt;
  &lt;th&gt;&lt;/th&gt;
  &lt;th class="sortable sorted order1"&gt;
  &lt;a href="lisItem.action?d-5522365-s=1&amp;amp;d-5522365-p=1&amp;amp;d-5522365-o=1"&gt;Item Name&lt;/a&gt;&lt;/th&gt;
  &lt;th class="sortable"&gt;
  &lt;a href="listItem.action?d-5522365-s=2&amp;amp;d-5522365-p=1&amp;amp;d-5522365-o=2"&gt;Category&lt;/a&gt;&lt;/th&gt;
  &lt;th&gt;&lt;/th&gt;&lt;/tr&gt;&lt;/thead&gt;
  &lt;tbody&gt;
  ....
  </code></pre>
  
  <p>My problem is when I add and return back to Listing, header (eg.Item Name, Category)of display tag table disappears.</p>
  
  <p>And after I added a new item, there are added new item info mixed on 
   <code>&lt;a href="lisItem.action?d-5522365-s=1&amp;amp;d-5522365-p=1&amp;amp;d-5522365-o=1"&gt;Item Name&lt;/a&gt;&lt;/th&gt;</code> and becomes like this</p>
  
  <p><code>&lt;a href="listItem.action?Item.ItemId=0&amp;amp;Item.Name=Blah Blah &amp;amp;Item.CategoryId=1&amp;amp;d-5522365-s=1&amp;amp;d-5522365-p=1&amp;amp;d-5522365-o=1"&gt;&lt;/a&gt;&lt;/th&gt;</code> </p>
  
  <p>and then <strong>Item Name</strong> disappear from the link header.</p>