Hi graham,
Just to confirm, I have single LNB on motorized dish, and I use the pass-though cable to LNB2.
This gets me the channels on the same multiplex, and I do see both tuners active.
From SCs posts about the quad LNB not showing the second tuner, I can only suspect there might be a bug.
SC, did you try it in non-freesat mode, and wait a while ?
That seemed to work for me, to "trigger" the dual tuner functionality. Originally, for me the second tuner was also inactive, until I did this.
Maybe I'll have to buy a dual LNB to test it (plus extra cable, or stackers).
Cheers,
Rob