Silly Question - Ability to change User Status

OK, this is probably a silly question, and I suppose the answer isn't important but i'm curious about an odd happening.

One of our employees exited the company, and of course we have a list of things that must be done when that happens (all the standard security stuff).  When I went in to change the user status and employee status (including the checkbox to display the employee record) the employee status had already been changed!  I checked with the other Administrators, and they both denied touching the record.

I've run a test with a fictitious user and a fictitious manager and neither has the ability to change the employee status.

Does anyone know (or have a thought) about how this may be possible?  I don't want to open a case and bother the Sugar Support Team with my silly question.

P.S. I've already changed the user status and altered the affected business processes that assign the user to account and contact records.