After you describe the wiring, please also describe the tuner configuration for every tuner. They must match each other.
The tuner with the Unicable LNB must be set as Unicable. If the other tuner has a direct wire from 19.2 with no switches, that tuner must be set as simple, single, 19.2.
I think I've possibly sorted it....
Tuner A is set as unicable with 28.2 and the manufacturer and model of the LNB That has a single coax straight to the Unicable LNB
Tuner B is set as simple 19.2 and single coax straight to the plane old standard LNB
Tuners C to H....
for some reason if I leave as FBC Automatic they dont seem to do anything... multiple recordings at same time on channels on 28.2 result in an message about a conflict in recording... so I'd changed them to FBC SCR, 28.2 and the rest of the details seem to populate from Tuner A as the manufacturer details are all there.
However what I hadn't done is chance the Channel so they were all set to SCR 1.... I've since read elsewhere that these need to be differentt... changing them just to SCR 2, and SCR 3 etc seems to have fixed my issues

