Without actually seeing or making a more detailed analysis of your property, I cannot provide you with an opinion as to what the current value might be. I can say, however, that based strictly upon the very limited information made available via the link to the property, my opinion is that the value shown is low, and probably should be closer to the figure that you paid for the house less than 6 months ago, if not higher.
If you are considering selling your property, I, or any other Realtor, as part of our due diligence in trying to "win" you as a client and list your home, would be more than happy to preview your home and perform a market analysis of your property.
I hope this information is helpful to you. As far as how and why Trulia is publishing this information about your home, I recommend you contact their customer service department.
If I may of any service to you, please feel free to contact me.