Now that we know your lenses are not Nikkors, the situation is easier to diagnose. Every lens has an identifier number encoded into its chip, to tell the camera what model it is. For Nikkor lenses, these numbers are unique, but that's not always the case with 3rd Party lenses, so your D600 may not be able to distinguish between them. I'd talk to Tamron about possibly updating the lens firmware.
The good news is that your camera is probably fine