Upgrading Norton AntiVirus

I'm trying to upgrade my Norton antivirus.  Evidently my current version is best buy branded.  I was trying to just use Symantec's site (rather than going through best buy), but ran into some issues:

 

1) You ask for version.  I am offered year.  However when I do support, about .... I am offered a version number.  I am current, but I brought my laptop in 2012.  So what year correlates to my version nuber (20.x.x.x). 

 

2) Renewal from Norton's seems to be 45, while I can buy a new copy (direct from Norton's for $39). 

 

All in all, I must say your renewal process really is a shambles.  Any clarification appreciated.