Yes (and no) - But the 2x Frequency PEQ problem is fixed.
But I thought I was going a little crazy as "occasionally" I was not measuring the right values. I set a filter at 100Hz and sometimes the JA11 use that value then then other times it was 92Hz (just connecting and disconnecting the cable would affect it - not changing the value of the Filter saved to the cable - they never changed in this test).
I thought maybe there is something weird with my setup, so I even went back and measured my Tanchim One DSP cable (and my FreeDSP Cable) with a similar 100Hz filter.
So here are 3 of the measurements:
View attachment 383699
The yellow is the Tanchim One DSP with a 100Hz filter.
The Red and the Blue are 2 measurements from the JA11 so the blue one is correctly set to 100 (but the dB value is wrong) and the Red one is roughly 92Hz.
But the pattern I spotted (at least with my cable) for this is linked to the distortion levels - when doing the blue measurement the JA11 had terrible (audible) distortion. e.g.
View attachment 383701
Yet when doing the Red measurement (i.e. the wrong Frequency value) it had very little distortion:
View attachment 383702
So, I would be great if someone else could try - maybe it is just something odd with my cable.