A couple of nav issues/questions with '07 Altima

I just got my new '07 Altima SE last night with Tech package and
overall, I am quite pleased. I am disappointed about one thing though,
the nav.

My two issues/questions are the following:
1) It looks like if you want to scroll around the map, you need to use
on screen up/down, corner, and rotate buttons. Where are the move left
& right buttons?
It seems this was designed more for the old '06 style joystick control.
Is there a way to move around the map by dragging the map with your
finger? This seems to be the way a lot of other GPS units do it.

2) When I navigate to an address, the computer accurately shows where I
am and follows me the whole time. When I get close to my destination, I
can see the destination icon on the map but the computer will say
something like "Destination Complete" even though I am around 500 or so
yards away. Last night, I was a whole block away!
How come it won't take me any closer? It clearly knows that I am not
there yet b/c the destination icon and the current location arrow are
not on top of each other.
I am pretty sure it has a good satallite lock.
Could this be a specific problem with my car or a bug in the software.
Any ideas?

This is very frustrating, especially when you are heading to someone's
house and it is hard to read house numbers.

Thanks,
Chad