Does anyone know how to calibrate the GPS in a 2010 Maxima?

I recently reset my navigation to factory defaults and after changing back to 3D Birdview and 1/16 mile scale, I've had a few issues.

The arrow jumps all over the road, which at times can be normal, but I've been driving the same roads with this car for almost two years using the same view and scale and have never had these issues.

The display is also frequently showing me on the wrong road for roads that are close together. Again, I know this can happen in some locations, but I haven't seen this in my area for all the time I've owned the car. The worst is when I exit the interstate and it takes a good 10 seconds or more before the display stops showing that I'm on the interstate.

I took it into the dealer today, but being a Saturday I got some BS about them only doing electronic diagnostics Monday - Friday.

I found an adjust location feature somewhere in the menus, but it wasn't very intuitive and required me to edit location based on the 2D map.

Any thoughts?

Thanks.

 

Did you ever get this figured out? I've got an '09 maxima and recently my maps have started to spin while I'm driving down straight roads and highways. I'd love to be able to recalibrate it.