I have an automation that is kicking off daily, but the automation that defined it has been deleted. How do I diagnose and find the cause of the daily email I am still getting.

A few weeks ago, I was testing automated sending of reports via email. I created a template of a canned report: Shipments by Customer. I added a schedule to our Send Reports screen. I set the report to email daily at 12:54 pm. Then I added this template to the schedule from the report screen. 

After some more testing, I dialed in my settings and created a new template and a new automated schedule. The new schedule sends the report every Sunday and is working fine. I deleted the original template and schedule… but I’m still receiving the daily email.
In the history, the only thing I can find at 12:54 is a generic “process all pending emails” schedule, but when I look into that history, there’s no evidence of my report in the pending/completed/failed list.