Check for duplicate email address as well as username (user registration)

I don't know why, but I just can't seem to get the validation to work. I have 2 validations going on - one to check the email format and the other to check the duplicate status. I've gone through the forums and applied various fixes but the duplicate validation just won't seem to work. Here is my code:

The recordset and the server validation:

<?php
$colname_newsletter = "-1";
if (isset($_POST['fieldset_group_Email_address'])) {
$colname_newsletter = (get_magic_quotes_gpc()) ? $_POST['fieldset_group_Email_address'] : addslashes($_POST['fieldset_group_Email_address']);
}
mysql_select_db($database_ourhands1, $ourhands1);
$query_newsletter = sprintf("SELECT * FROM visitors WHERE VisitorEmail = %s", GetSQLValueString($colname_newsletter, "text"));
$newsletter = mysql_query($query_newsletter, $ourhands1) or die(mysql_error());
$row_newsletter = mysql_fetch_assoc($newsletter);
$totalRows_newsletter = mysql_num_rows($newsletter);

// WA Application Builder Insert
if (isset($_POST["Default_submit"])) // Trigger
{
$WA_connection = $ourhands1;
$WA_table = "visitors";
$WA_sessionName = "VisitorID";
$WA_redirectURL = "index.php";
$WA_keepQueryString = true;
$WA_indexField = "VisitorID";
$WA_fieldNamesStr = "VisitorEmail|userLevel";
$WA_fieldValuesStr = "".((isset($_POST["fieldset_group_Email_address"]))?$_POST["fieldset_group_Email_address"]:"") ."|" . "2";
$WA_columnTypesStr = "',none,''";
$WA_fieldNames = explode("|", $WA_fieldNamesStr);
$WA_fieldValues = explode("|", $WA_fieldValuesStr);
$WA_columns = explode("|", $WA_columnTypesStr);
$WA_connectionDB = $database_ourhands1;
mysql_select_db($WA_connectionDB, $WA_connection);
if (!session_id()) session_start();
$insertParamsObj = WA_AB_generateInsertParams($WA_fieldNames, $WA_columns, $WA_fieldValues, -1);
$WA_Sql = "INSERT INTO `" . $WA_table . "` (" . $insertParamsObj->WA_tableValues . ") VALUES (" . $insertParamsObj->WA_dbValues . ")";
$MM_editCmd = mysql_query($WA_Sql, $WA_connection) or die(mysql_error());
$_SESSION[$WA_sessionName] = mysql_insert_id();
if ($WA_redirectURL != "") {
if ($WA_keepQueryString && $WA_redirectURL != "" && isset($_SERVER["QUERY_STRING"]) && $_SERVER["QUERY_STRING"] !== "" && sizeof($_POST) > 0) {
$WA_redirectURL .= ((strpos($WA_redirectURL, '?') === false)?"?":"&").$_SERVER["QUERY_STRING"];
}
header("Location: ".$WA_redirectURL);
}
}
?>
<?php
if (isset($_POST["Default_submit"])) {
$WAFV_Redirect = "index.php?invalid=true";
$_SESSION['WAVT_index_Errors'] = "";
if ($WAFV_Redirect == "") {
$WAFV_Redirect = $_SERVER["PHP_SELF"];
}
$WAFV_Errors = "";
$WAFV_Errors .= WAValidateEM((isset($_POST["fieldset_group_Email_address"])?$_POST["fieldset_group_Email_address"]:"") . "",true,1);

if ($WAFV_Errors != "") {
PostResult($WAFV_Redirect,$WAFV_Errors,"index");
}
}
?>
<?php
if (isset($_POST["Default_submit"])) {
$WAFV_Redirect = "index.php?invalid=true";
$_SESSION['WAVT_index_Errors'] = "";
if ($WAFV_Redirect == "") {
$WAFV_Redirect = $_SERVER["PHP_SELF"];
}
$WAFV_Errors = "";
$WAFV_Errors .= WAValidateNM($totalRows_newsletter . "",-1,0,"",",.",true,3);

if ($WAFV_Errors != "") {
PostResult($WAFV_Redirect,$WAFV_Errors,"index");
}
}
?>


My 2 form fields:
<div class="fieldGroup"> <span id="fieldset_group_Email_address_Spry">
<input id="fieldset_group_Email_address" name="fieldset_group_Email_address" type="text" value="<?php echo((isset($_GET["invalid"])?ValidatedField("index","fieldset_group_Email_address"):"")); ?>" class="formTextfield_Large" tabindex="1" onblur="hideServerError('fieldset_group_Email_address_ServerError');"/>
<span class="textfieldInvalidFormatMsg">Invalid format.</span><span class="textfieldRequiredMsg">Please enter your email address.</span> </span>
<?php
if (ValidatedField('index','index')) {
if ((strpos((",".ValidatedField("index","index").","), "," . "1" . ",") !== false || "1" == "")) {
if (!(false)) {
?>
<span class="serverInvalidState" id="fieldset_group_Email_address_ServerError">Please enter an email address.</span>
<?php //WAFV_Conditional index.php index(1:)
}
}
}?>
<?php
if (ValidatedField('index','index')) {
if ((strpos((",".ValidatedField("index","index").","), "," . "2" . ",") !== false || "2" == "")) {
if (!(false)) {
?>
<span class="serverInvalidState" id="fieldset_group_Email_address_ServerError">That address is already in our databse.</span>
<?php //WAFV_Conditional index.php index(2:)
}
}
}?>
</div>

Any help would be really appreciated.