[Elecraft] [K2] Secret to K2 calibration programming?

[Mike-WE0H]

OK, here the deal. My K2 S/N 6698 doesn't have the same freq offset on 
all the bands. How can I program that so it is dead nuts on every band? 
Here's the freq measurement spots and what the radio is showing as a 
center freq using Spectrogram.

Signal freq then radio's displayed freq...
1.90000   1.90003
3.90000   3.90003
5.50000   5.50003
7.20000   7.20003
10.1000   10.1004
14.2000   14.2005
18.5000   18.5005
21.2000   21.2000
24.9000   24.9001
28.2000   28.2001


See how it is not the same offset across the bands? Something funny is 
going on here...

Thanks for the help.

-- 
Mike
WE0H
K2 #6698
SKCC #5446