exit() after headers

admin/index.php

   =========================== */
 ?>
 <?php
-
-
 require('../entry.php');
 global $user, $conf, $tumble;
 $template = new plantillas("admin");
 $isEdition = (isset($_GET["edit"])) ? true : false;
 $postId = ($isEdition) ? $_GET["edit"] : NULL;
 
-if ($user->isAdmin()) {
+if ($user->isAuthenticated()) {
 
 	if (isset($_GET["delete"])) {
 		$tumble->deletePost($_GET['delete']);

login.php

 	header("Location: ".$conf->urlGelato."/admin/index.php");
 } else {
 	if (isset($_POST["pass"]) && isset($_POST["login"])) {		
-		//print "<pre>"; print_r($_SESSION); print "</pre>";die();
-		if ($user->validateUser($_POST['login'], md5($_POST['pass']))) {
+		if ($user->validateUser($_POST['login'], md5($_POST['pass']))) {			
 			header("Location: ".$conf->urlGelato."/admin/index.php");
-		} else {
+			exit();
+		} else {			
 			header("Location: ".$conf->urlGelato."/login.php?error=1");
+			exit();
 		}
 	} else {
 ?>