Multiple device registrations on Amazon

[Natey2]

Why are there so many variations of my phone and tablet (registered as separate devices) in my account at the Amazon Appstore?

http://www.amazon.com/gp/mas/your-account/myapps/yourdevices

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[mattman5000]

That has happened to me every time I put a new rom on my old Droid X or my HP touchpad. I guess everytime you reinstall the amazon appstore, it thinks it is a new device.