My Nuvi 1390LMT cannot find locations of some addresses that have been in existence for decades, even with postal codes programmed into the unit. I have the latest map updates installed. Also it shows my home address as being a fifth of a mile from its actual location. Is there a fix for this problem or a model that is more reliable. I have owned a Nuvi 750 and 755T and had problems with them as well. Thanks, musicman