motorized dish with twin tuner

I am using on one box motor with twin tuner. I had expected that for tunner "B" will be true setting as "Second cable of motorized LNB Tuner A".

But when I want using PiP, then I must use "Equal to", because for "Second cable of motorized LNB Tuner A" I get "Tunning failed" always.

But when I use PIP with "Equal to" configuration once, then I can switch tuner "B" to "Second cable of motorized LNB Tuner A" configuration and then it works well -  to next reboot of box. It seems, there will be some wrong initialization or must be used "Equal to" always ? I think, "Equal to" is for 2 motorized dishes.

Does somebody same experiences with it ?