Tidy failed to fix this error.

original:

<table>
   <tr>
      <td>
         <table>
            <tr>
               <td>
               </td>
            </tr>
            <a href="error_placement">here</a>
         </table>
      </td>
      
      <td>
      </td>
   </tr>
</table>

after tidy:

<table>
    <tr>
        <td>
        <a href="error_placement"></a>here
        <table>
            <tr>
                <td></td>
            </tr>
        </table>
        </td>
    </tr>
</table>

<table>
<tr>
<td></td>
</tr>
</table>

i think there are two things abnormal:
    1."here" not a HRL after tidy now.
    2.the table struction changed,and looks different.
so:
    I have read the code,and knew it's difficult to fix every error perfectly,but i still want to find some way to cope with this better.
give me some suggestion or help me.thank.