Disable wp-cron.php
add this to wp-config.php
define('DISABLE_WP_CRON', true);
comment this line on public_html/wp-includes/Cron.php
//spawn_cron( $local_time );
add this to user cron job
php -q /home/cPanel_User/public_html/wp-cron.php > /dev/null 2>&1