I was surprised "stepping though the bands" that between 20 and 17 meters 16.500 MHz appears on the remote display. It is not any amateur frequency
Yaesu tech supports explained that the only way I can delete that frequency display is resetting the CPU.
That means putting frequencies and setting up repeaters again. I'd also have to change any options that were not default selected.
No one can explain how the unwanted frequency got in the up/down band select. I decided to live with the problem as rebooting the CPU will require a lot of time to re-program the FT 857D.
If anyone was encountered this problem please email me your correct firstname.lastname@example.org