Not sure why it doesn't make sense to you.

For instance you have a scheduled job that runs at 6PM daily. You have an automated email every morning reporting success/failure.

Then job broke. You made corrections and ran it MANUALLY. Now, the next morning you only want to see the report about automated jobs, not the one manual once.

That's fine, I found a way to do it. I am looking at highest instance for a given job to pick the latest.