Motools HTMLTable Sort - Secondary sorting - mootools

Question

I'm trying to sort a table which can have more than 2 columns (Datetime, Name, Email etc.)
I'm using mootools HTMLTable sort to sort the columns. But when I sort on Name, none of the other columns are sorted. How would it be possible to make a secondary sort column work ?
Example : (When I sort on the name column, the datetime column goes out of wack)
5/08/2014 09:51:18 AM | Adam | adam123#gmail.com
5/12/2014 03:51:28 PM | Adam | adam123#gmail.com
5/10/2014 04:51:38 AM | Adam | adam123#gmail.com
5/07/2014 04:23:21 AM | Adam | adam123#gmail.com
5/11/2014 06:51:48 PM | Dave | dave123#gmail.com
5/09/2014 10:51:58 AM | Dave | dave123#gmail.com
I tried doing a secondary sort with the datetime column but nothing happens.
HTML :
<table id="report_table">
<thead>
<tr>
<th>Date/time</th>
<th>Name</th>
<th>Email</th>
<tr>
</thead>
<tbody>
<tr>
<td>5/08/2014 09:51:18 AM</td>
<td>Adam</td>
<td>adam123#gmail.com</td>
</tr>
<tr>
<td>5/12/2014 03:51:28 PM</td>
<td>Adam</td>
<td>adam123#gmail.com</td>
</tr>
<tr>
<td>5/10/2014 04:51:38 AM</td>
<td>Adam</td>
<td>adam123#gmail.com</td>
</tr>
<tr>
<td>5/07/2014 04:23:21 AM</td>
<td>Adam</td>
<td>adam123#gmail.com</td>
</tr>
<tr>
<td>5/11/2014 06:51:48 PM</td>
<td>Dave</td>
<td>dave123#gmail.com</td>
</tr>
<tr>
<td>5/09/2014 10:51:58 AM</td>
<td>Dave</td>
<td>dave123#gmail.com</td>
</tr>
</tbody>
</table>
Javascript :
var sortableTable = new HtmlTable($('report_table'), {sortable: true, sortIndex : 1});
sortableTable.sort(0, false, false);
EDIT : Added HTML as well. If I just sort by the datetime column, it sorts fine, but it doesn't do well only if the secondary sort is on date/time.
Any help would really help.

Answer 1

Remove sortIndex option and use sort method to specify primary and secondary sort, as described in the documentation. Mootools will remember sort options for columns even after the user clicks on thead to resort the table.
var sortableTable = new HtmlTable( $('report_table'), { sortable: true } );
sortableTable.sort( 0, false, true );
sortableTable.sort( 1, false, false );