I wouldn't worry too much about it. The internet isn't perfect, and this website isn't perfect by any means. There can sometimes be a glitch in different mapping features and there is nobody at Trulia who cares about stuff like this. It's just a database of info, and pulls this data from various sources. Sometimes the data is wrong, or gets imported incorrectly. Sorry I don't have a better answer for you. I know it can be frustrating!