I also moved twice since ordering, but I only had to change my shipping address once. I did this by email and before I got a tracking number. Johnny at Support confirmed the change.
I followed the tracking number to delivery last week -- and it appears they sent the device to my billing address, which was my former residence. I have a mail forward order on that address, but USPS did not follow it. I'm confused about the whole ordeal, but I'm hoping support will get back to me soon. They seem a little busy.