My demo used Nighthawk R7000 places all connected devices in completely wrong geographical location!

Hi,

I bought a Nighthawk R7000 from Amazon.com. It was demo used and shipped by a Amazon seller, not Amazon.com themselves. When I got it it turned out it was registered with someone else. Netgear took care of that after I sent them the receipt and picture of the serial number on the router. I thought all would be well until all our devices at home, phones and computers, appear to be located at a certain address in Brooklyn. When I turn on GPS in the phones I get the correct location, but when GPS isn't available I'm all of a sudden in Brooklyn, NY at one specified address! I call my carrier and my ISP. Nothing wrong with either. Then I turn off wi-fi on the phones and the location is correct again on those devices. The ones still on wi-fi are still in Brooklyn. I get the wrong weather forecast on my Roku TV and phones. All location depending functions are wrong too.

Finally I turn to the router. Can't find anything in the settings, but when I look at the Amazon invoice for it it says that it was shipped from, yes you guessed it, Brooklyn, NY! How is it possible that the router is still back in Brooklyn, at one particular address and tells all connected devices they are also? And what do I need to do to have this fixed? Is this Brooklyn address stored in the router somewhere and used for location? If someone could help me out it would be great. I have never experienced anything like this before.