The 11 means that your captcha validation failed... the number represents the number of the failed validation at the end of the line like:
$WAFV_Errors .= WAValidateLE((strtolower(isset($_POST["Registration_group_15_Security_code_2"])?$_POST["Registration_group_15_Security_code_2"]:"")) . "",((isset($_SESSION["captcha_Registration_group_15_Security_code_2"]))?strtolower($_SESSION["captcha_Registration_group_15_Security_code_2"]):"") . "",true,11);
But at this point your page is very cluttered. It looks like you have used a new insert server behavior for each column in your table and have a redirect in each as well. That means only the first one would run, since the page would redirect after. You should delete all but one of the Insert Record server behaviors and bind all of the columns in a single insert.