My 2009 is now a 2008 according to California DMV

This is an easy one because I had the same problem when moving from AZ to FL. In your case, contact Winnebago and ask for a "Certificate of Origin". It will explain to DMV that your coach was a 2009 built upon a 2008 chassis. The VIN of the chassis will still show it as a 2008 but the letter will be all that is needed to get a correct title. For those with coaches built by companies that are no longer in business then this documentation is near impossible to acquire.