on the app2.php page, where you display the data, you need to add hidden form elements in order to pass it to the next page:
for example:
<td class="DetailsSublabel">Date Added:</td>
<td class="DetailsPage"><?php echo(($row_WADAcp_contents['cp_Date'])?date('n/d/Y',strtotime($row_WADAcp_contents['cp_Date'])):''); ?><input type="hidden" name="cp_Date" id="cp_Date" value="<?php echo(($row_WADAcp_contents['cp_Date'])?date('n/d/Y',strtotime($row_WADAcp_contents['cp_Date'])):''); ?>" /></td>