Since I've had the phone now for a little over a month, about half the time that I start up Maps, it shows "My Position" as being at a house I lived at about a year ago, which is about an hour drive from where I live now. Back then, I was not with Verizon, but with ATT. After a minte or so on Maps, it brings up my correct position. That changed about 4 days ago when I recieved a signal extender that was ordered from Verizon. Now, Maps starts up showing that I'm near a golf course in Canyon Lake, California. About 3 minutes later, it corrects itself. What could be triggering that?