4 sats to 1sub + 1 FTA signal loss.

[Polayvrak]

Please take a look at the diagram for my setup details. The problem I have is as soon as I turn on both receivers, the 82 sat signal drops to 50% from 95% on both receivers. All other sats maintain around 95% signal strength.

Is it because of the DISEqC switch?
How can I fix it?
19761