Tuner A not honouring manual UB and frequency?

[something_fishy]

Hi
I'm new to Enigma2/Openvix and also to full band capture and dSCR/unicable technology.

I have just set up a Gigablue Quad 4K box with Unitron dSCR-54 (which I think is an old model dedicated to Sky)

After setting up how I thought correctly I have been getting failed tunes.

The entry for Tuner A appear not to be respected, rather a preset Johannson dSCR switch is being reported (I think its the last one played with before I switched to userdefined). The tuner setup screen is set like this:
1_0_19_1B1D_802_2_11A0000_0_0_0_20210204150322.jpg

but running cat /etc/enigma2/settings... ...
produces this

config.Nims.0.advanced.lnb.1.bootuptime=0
config.Nims.0.advanced.lnb.1.format=jess
config.Nims.0.advanced.lnb.1.lof=unicable
config.Nims.0.advanced.lnb.1.powerinserter=True
config.Nims.0.advanced.lnb.1.scrList=3
config.Nims.0.advanced.lnb.1.unicable=unicable_matrix
config.Nims.0.advanced.lnb.1.unicableManufacturer=Johansson
config.Nims.0.advanced.lnb.1.unicableProduct=9750I
config.Nims.0.advanced.sat.282.lnb=1
config.Nims.0.advanced.sats=282
config.Nims.0.configMode=advanced
config.Nims.0.diseqcA=282
config.Nims.0.diseqcB=3601
config.Nims.0.diseqcC=3601
config.Nims.0.diseqcD=3601
config.Nims.0.powerMeasurement=False
config.Nims.1.advanced.lnb.1.format=jess
config.Nims.1.advanced.lnb.1.lof=unicable
config.Nims.1.advanced.lnb.1.scrfrequency=1280
config.Nims.1.advanced.lnb.1.scrList=9
config.Nims.1.advanced.sat.282.lnb=1
config.Nims.1.advanced.sats=282
config.Nims.1.advanced.unicableconnected=True
config.Nims.1.advanced.unicableconnectedTo=0
config.Nims.1.configMode=advanced
config.Nims.1.diseqcA=3601
config.Nims.1.diseqcB=3601
config.Nims.1.diseqcC=3601
config.Nims.1.diseqcD=3601
config.Nims.1.powerMeasurement=False

...
... etc

As shown above, Tuners B ~ H which are slaved off A are respecting manual instructions.
I'm hoping that my workaround - choosing one of the preset switches that has the same Userband and frequency as I need for the dSCR-54 will work but am I doing something wrong or is this a bug?

Also do I need to do anything else?