Can't really make heads or tails of this. Received my new nav disk beginning of this year. It display the street names great but looks as if I'm driving in the great abyss. For example, I have my home set and it shows the street name and address but appears as though i'm in a field somewhere. I've noticed this with quite a few streets. It sees the street name but doesn't actually show the street. Hope this makes sense. Any ideas?