Cron Job Problem

[BHead]

I had two cron jobs that I needed to run, and I noticed that you could only have a cron job run every five minutes. After adding both cron jobs and thinking I was alright, I noticed that both of my cron jobs were deleted in mere minutes after adding them. I'm guessing that I'm only allowed to run "one" cron job every five minutes, and I can't just set two of them to run every five minutes.

Now whenever I go to add a cron, I got this error:

Error
/usr/bin/crontab: error renaming /var/spool/cron/tmp.XXXXM8nOwQ to /var/spool/cron/leetsauc
rename: Operation not permitted

I'm guessing my only option is to combine both of my cron jobs into one php file?

Thanks!

Brandon