Cron job changes automatically


Dec 1, 2012
cPanel Access Level
Website Owner
I have */5 * * * * in the cpanel cron job, after several minutes or hours this changes automatically to */17 * * * *...
I noticed this change twice...
I was waiting for the task to complete in 5 minutes, several tasks have been completed, then I saw it isn't working, so I checked the cron jobs in Cpanel and I saw the */5 was changed to */17. I changed back to /*5 twice.
Is somebody playing or it is some bug changing cron jobs automatically???
It is not good, I can't check every day the cron jobs are changed or not...
Any ideas? Any advice?