Cron jobs running twice - Ubuntu server 12.04
First, your conclusion that there are two cron processes is wrong. There's one cron and one grep in your output.
Next, you say that the quoted file is in your root crontab. What you quoted says that it's in /etc/crontab. So, is that the contents of /etc/crontab or crontab -l -u root? Those are two distinct things.
If it's both, well, then you're telling it to run those things in one place and then in another place, so twice. You probably want to remove it all from root's crontab.