On the confirm.php page you have two includes from different versions of validation toolkit:
<?php require_once("webassist/form_validations/wavt_validatedform_php.php"); ?>
<?php require_once('Connections/PowerStoreConnection.php');?>
<?php require_once('WA_CMS/WA_CMS.php'); ?>
<?php require_once("webassist/form_validations/wavt_scripts_php.php"); ?>
<?php require_once("WA_ValidationToolkit/WAVT_ValidatedForm_PHP.php"); ?>
remove that second one:
<?php require_once("webassist/form_validations/wavt_validatedform_php.php"); ?>
<?php require_once('Connections/PowerStoreConnection.php');?>
<?php require_once('WA_CMS/WA_CMS.php'); ?>
<?php require_once("webassist/form_validations/wavt_scripts_php.php"); ?>