[Elecraft] K3: Filter settings when changing bands

[Ed K1EP]

Has anyone seen this?

Say I am on 12M USB.  Filter width is set to 2.7.  I switch to CW, 
set filter to 400.  Everything is fine.  I switch bands to 17M CW by 
tapping the band down twice fast.  Filter is set to 2.7, so I change 
it to 400.  I switch back to 12M, both USB and CW filter settings are 
correct, I can toggle between the two modes.  I then go from 12M USB 
back to 17M CW by tapping band down twice.  The filter on CW is back 
again to 2.7.  Why wouldn't it remember the last setting I had for 
CW?  It was last set to 400 when I was on 17M CW.  I changed bands 
and came back, it now was changed.  I used these two bands, but I 
think maybe it would happen on two randomly chosen bands.  Am I 
missing something here?  Or maybe I have been chasing too many DX this morning.