I renewed my annual subscription today. There were two options for the same product, one was Norton Antivirus 2011 BUY NOW and the other was Norton Antivirus 2011 RENEW NOW. The BUY NOW option was $39.99 and the RENEW NOW was $44.99. Please advise why there is a $5 difference for the same product. Will I get credit for the $5? Please advise