Trulia receives/posts listings from many sources. They pull data from Multiple Listing Services like http://www.Realtor.com,
and Public Records (not necessarily recently updated), as well as private citizens, landlords, owners, etc..ANYONE can post anything on the site. It is up to all Trulia users to report Phishing and Spam abuse.
If you use Public Recordws (where accessible online) and stick to http://www.Realtor.com
which only shows postings by licensed professional Realtors, you should see much more accurate information.
All the best,
Realtor, Property Manager
Your Real Estate Resouirce For Life
CELL (267) 254-7994