First you should install the "e2fslibs" package to get ride of the chattr errors.
Regarding the cron. If it's a PHP file that can also be accessed from browser (like Wordpress's wp-cron.php) you only have to specify it's URL and the cron will execute it via wget I guess.
Therefor the cron entry in the middle looks right - the other's don't. You might want to change those.