Trulia pulls information from a variety of sites and there can be plenty of incorrect information depending on the accuracy of the sources. It is not uncommon to see listings that are already sold or off market. The foreclosure sources also supply information that requires a lot of additional research to determine the true situation.
Still, it is a fantastic resource for the public, but it does not replace the services of a Realtor, who has the benefit of both accurate public records and the complete MLS.
If your house is listed for sale that information will be corrected. I will also drop a note to Trulia for you to see if they can make a correction on your house.