The good news is Zillow.com has it correct. Zillow now owns Trulia and is working on improving Trulia. Both Zilow and Trulia get their facts from your county's public information database. Visit your county's tax assessor or public database and see what they have on file. Just curious how Zillow has the correct information but Trulia does not yet they get it from the same county.
As for correcting it, on the listing page, there is a blue link to edit home facts. If you have trouble doing it, as a local realtor to do it for you.