No surprise at all, timber. You are a reasonable fellow, after all.
I understand what you're saying about "legalese" and fine print, and all, but it would be unconscionable to allow Symantec to sell 12 months of service, but only offer 2, EVEN IF the fine print purported to allow them to do it. Thus, it's extremely unlikely they would get away with it, if push came to shove.
If it's by design (which I doubt), and the result is a bunch of ripped off customers, might make for a nice class action lawsuit. Hmm.
But more than likely, it's a technical error, and customer service is just befuddled. Have you tried going higher up the food chain with Symantec, cleaburn? (And I take it that rebooting trick didn't work?)