Did a tree with a positioner only, and with a C band LNB, to test messages sent.
Both the "lock turner..." and "send diseqc..." options are enabled.

But messages are sent to every satellite in the lists, even undesired ones. For example,

Here the bug seems: unselected satellites (diseqc 1.2 positions) and their channel lists should not send any diseqc messages, as they will be wrong ones.