Welcome to Trulia and thank you for your question.
Only listings manually submitted to Trulia can be edited at this time. We are working to make all listings editable in the future, but in the meantime you'll need to update your listings at the source. You can find out which source sends us information for the listing in question by clicking on the 'Listing Web Site' link from the listing on your profile page here: http://www.trulia.com/voices/profile/Real_Estate_Pro-12533-603027/
Once you know which source is sending the information to us, verify that they are showing the correct information on their site and contact them directly to ensure that they provide the most up-to-date information in the data feed they send to us. Once they do so, our display will update automatically with the new information.