So let's say I have the same satellite twice on 2 tuners, how will I've control on choosing the one with the higher signal value?
Is it intelligent enough to choose the best available source every time?
And if another client try to tune to the same satellite at the same time, it will use the other available tuner resource which is free?

Tuner A is working as expected, btw.

In auto scan I've only listed tuner A and B.
No C which is another issue.

I will try to put the two sat tuners in slot A and B as you suggested and disconnect the third cable one in the meantime.