avast! 8 Free License Bug

i have registered avast approximately one week ago, so it should be decreased by a few days. but the registration bar (license bar) keeps telling me :You Have 391 Days Remaining". is this a bug? i’m not annoyed with it, but i’m curious to find out what is causing this

http://cdn.kaskus.com/images/2013/07/08/4998421_20130708090440.png

It probably added the remaining days of the 30 day trial to the one year license.
Certainly nothing to worry about. :wink: