Multiple Copies of Cookies Running

[PJM005]

I occasionally see two icons for the Cookies app in my menu bar. It is unclear what triggers the second icon to appear.  At startup and at most times there is only one icon.  Then mysteriously, a second icon shows up. Quitting one leaves the second ion in place but non-favorite cookies are deleted. I am running the most-recent version of Cookies on a MBP Rentina  15-in late 2013 with the OS X 10.11.5. I typically have only one browser open - Safari. Any ideas of what is causing the second copy to run and how to prevent it? Thanks.

[SweetP]

do you have a backup drive attached?
I've had reports from users saying this can happen when they have a backup hard-drive attached.