Licenses overlapping

I recently bought a new license because my old one is due to expire in a month. I would include a screenshot if I could, but let’s just say the new license will expire one year from the day I bought it rather than one year from the expiration of the old one. I received word in January that my subscription would be up for renewal soon, so I comparison shopped among the few other antivirus companies I knew of. I turned off auto-renew in case I might decide to switch to something else. But none of the others appealed to me, so I decided to stick with Avast. So I bought my renewal on Feb 10 2016, & here are the results:

Old license: Expires Mar 16 2016

New license: Expires Feb 10 2017

Perhaps if I had kept auto-renew on, I might not have this overlap of licenses.

See: https://www.avast.com/faq.php?article=AVKB24#idt_0110

You didn’t paid for a renewal but bought a new subscription.
New subscriptions start at the day you buy them.
A renewal (extension) will as it say extend the existing license.