[Elecraft] K3s & P3 used with Data

[Bob]

I've been using my K3 & K3s for years using the DATA mode.  It has worked
as if it were in the USB mode, and shows on the P3 scope to the right of
the dial frequency just like a USB signal would.

Today I tried 60 meters for the first time.  I could pick up signals and
decode them just fine in USB mode, and the P3 showed the signals to the
right of the dial frequency as expected.  However, when I shifted the radio
into DATA mode, the P3 seemed to shift as if it was showing a double
sideband signal (half below the suppressed carrier and half above).  At
this point, when in DATA mode, nothing would decode until I selected REV
DATA.  The result of that was that calculated frequencies were wrong
(appearing that signals were significantly outside the US channel limit.

Am I missing some setting, or is there something unique about how the DATA
mode works on 60 meters?

73, Bob, WB4SON