I have to go out for a bit, but wanted to send the following for question 2 - before I go.
About "Map Errors" concerning addresses and such NOT matching your physical location.
First, you need to know that Garmin (and most other GPS manufacturers) get the DETAILED information for the maps from independent "Data Companies", and these companies gather and compile that data on an ongoing basis.
For addresses specifically, MOST of that information is gathered from city, county, or even state generated information - such as the "traffic departments" of each entity.
Often, this address data is NOT very detailed, as it may have been generated when the streets or roads were first built, and it may not have EVER been updated at all (unless you send information in - that it is not correct).
For example, a particular street may start at address 1000 where it intersects with one road, and the next intersection is where address 2000 starts.
So if there is NO data generated (or updated) for the address numbers in between, and a house built a year or so later is built exactly in the center of that road (between the two cross-streets), then that address might be "assigned" a number of 1500 (or 1501 if on the other side of the road). But if the city or town assigns a different number (sometimes at the request of the business or developer), and does not record and update that information for months - or even years - then the GPS data used for that address will be wrong when used as an address that is entered into the device.
So the best way that you can "report" ANY map errors is to send it in to the company of the device you use most, so that it can be verified and fed back to the data company that supplies the manufacturer of the device.
NOTE: When you do this, try to be as detailed as possible - to make it "easier" for the company to check it and send it to their supplier.
Once that is done, then it just a matter of time before that correction gets put into the device,
Another note: At present, Garmin usually gets updated map data 3-4 times each year - from their supplier. So it could be 3-6 months (or MORE) before you have a chance to see your correction data show up in your device,
Below is a direct link to where you can report errors to Garmin.
Report a Map Error Page
I hope this helps explain a bit about how this data is generated and use by the makers of these devices. Please let me know if you have any more questions.
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