Re-appearing CRON job even after it has been removed

[rromano]

Linux Version : Centos 6.3
Plesk: 11.09 (mu#53)

I am new to linux, One of our users created a weekly backup job through plesk and we are trying to have it removed. Even though we have removed the task from the Plesk control panel it still runs weekly. We have logged in both as an administrator for the whole server and under the user's id and the task does not show anywhere but it still runs...

I run the following commands to check if it is spooled and get the following results, not really sure what it means:

#crontab -l
#ls -l /var/spool/cron
total 4
-rw------- 1 root root 16 Oct 17 2012 pscadmin
-rw------- 1 root root 0 May 16 03:34 root

I also checked the weekly cron but not sure how to view whats in it and was wondering if it is in here but not showing in plesk:
#cd cron.weekly
50plesk-weekly
#ls -l
total4
-rwxr-xr-x 1 root root 127 june 8 2012 50plesk-weekly
#cat 50plesk-weekly

displays:
#!/bin/sh
/usr/local/psa/bin/sw-engine-pleskrun /usr/local/psa/admin/plib/DailyMaintainance/script.php weekly >/dev/null 2>&1



Your input is greatly appreciated.