[Elecraft] Mode not Switching with band change?

[David F. Reed]

I am running an Elecraft K3 and a KPA1500 amplifier. I use the DXLab 
Suite of programs for logging, rig control and so on.

If I do a manual band change on either the K3 or using the KPA1500 and 
change back and forth between 15m and 40m, the side band changes 
appropriately.

If I do it using the Commander Bandspread window buttons and go from 15 
to 40, it stays in USB.  I can then do a MODE ALT to get the correct 
mode, but it doesn't stick if I go back and forth.

FWIW, going to 80 has the same issue...

I suspect the K3/KPA1500 set are working correctly since the only 
misbehavior is when I do it with Commander.

Has anyone else seen this, fixed it, or have any hints?