After some searching through the code, I found why the submit button is not functioning. Around line 418 of orders_editable.php you'll find this:
<tr>
<td colspan="6"><table border="0" width="100%" cellspacing="0" cellpadding="2">
<tr>
<td class="smallText" valign="top"><?php echo $orders_split->display_count($orders_query_numrows, MAX_DISPLAY_SEARCH_RESULTS, $HTTP_GET_VARS['page'], TEXT_DISPLAY_NUMBER_OF_ORDERS); ?></td>
<td class="smallText" align="right"><?php echo $orders_split->display_links($orders_query_numrows, MAX_DISPLAY_SEARCH_RESULTS, MAX_DISPLAY_PAGE_LINKS, $HTTP_GET_VARS['page'], tep_get_all_get_params(array('page', 'oID', 'action'))); ?></td>
</tr>
</table></td>
</tr>
Grab that code and move it about eleven lines down, just below this:
<td class="smallText" align="right"><?php echo HEADING_TITLE_STATUS . ' ' . tep_draw_pull_down_menu('new_status', $orders_statuses, '', ''); ?></td>
</td>
<td><input type=submit vlaue="edit Orders"></td>
</tr>
That should fix the problem. The reason this is done, is that the section of code that was moved had a "</form>" tag in it, which it's supposed to, but caused the submit button to do nothing.
Also:
Make sure you've deleted the three references to o.ip_address.