Hi,
I'm in exactly the same situation - trying to tidy up an inherited installation. I think I've got the hang of policies etc, but in my learning experience I've also ended up with two "orphan" jobs - they were created by a policy, the policy no longer exists so I cannot delete the jobs.
As the policy no longer exists, I can't right-click it and "Delete jobs created by policy".
I'm pretty sure the problem is of my own making, but would appreciate any help in tidying up my installation!
Phil