Why is SP 2010 sending out notices regarding deletion of my sites for staff who are still here?

I was going through our sp 2010 farm account mailbox this morning. I delete all those out of the office reminders people send out when SharePoint sends alerts, etc.

However, this morning I got an out of office message from a manager on vacation; the message had the subject:

 The My Site of Smith, John D is scheduled for deletion

(where it really had a user here at our company instead of John D Smith).

Now John has been here for a year or more, still is here (just saw him) and so why would SP 2010 be notifying his manager about deleting his mysite?

Not only that, but I don't have the checkbox set for "Send e-mail notification to users of unused site collections" or the checkbox set for "Automatically delete the site collection if use is not confirmed".

1. What do I do to stop these emails from being sent?

2. Why is it doing this?

Thanks!