I had upgraded from NIS 2008 to NIS 2009, when NIS 2009 came out. My current subscription (1 PC) was set to expire near the end of November. About 2 weeks ago I purchased the NIS 2009 2 year (3 PC) upgrade with NSW Basic 12 from the online store. I was going to wait until my current subscription expired and then use my new subscription so I wouldn't waste the time left on my current subscription.
After gett the 16.1.0.33 upgrade, NIS 2009 check Norton account for my subscription info and picked up my new subscription somehow and started using that one. Granted, that the subscription only had 10 days left so I only lost 10 days, but I shouldn't have lost any days.