As can be seen on the screenshots, I have other equipment to test with.
I also have two Telestar Digibit R1 tuners, running minisatip, with Dur-Line UK 124 LNB's.
The Dur-Line LNB's are not programmable, so can not be combined on a single tuner.
Here are some test results:
The MAX S8 would not work with a Dur-Line (I did adjust the Unicable frequencies).
The Telestar does work with a single Dur-Line on the same position (Astra 2).
The Telestar does work with a single Inverto LNB (after adjusting Unicable frequencies).
And, the Telestar does work with two Inverto LNB's using combiner and power inserter!
So, it appears TVH does support Unicable/Jess positions, and it appears something is wrong with the DD Max S8.