Many previous year bikes were titled in the year they were sold and many Honda shops back then followed this practice. As long as the owner knows to order parts for a different year, nobody ever seemed to mind this minor titling issue.
Still, at least here in Louisiana, an Affidavit of Physical Inspection at the local Louisiana State Police office would be where I would begin to plead my case. Once convinced that I was correct, I would then go to the DMV Office where with a little luck and an understanding clerk, it might get changed.
Rick