Because of the way the Brood Brothers visibility logic has been set up, Legends units are always visible even if "Show Legends" is unchecked.
The logic needs to to be flipped so that the units are hidden if the Brood Brothers Auxilia Detachment is not chosen, rather than the other way around. Currently, the "unhide" from Brood Brothers is overriding the "hide" from the Legends flag.
Because of the way the Brood Brothers visibility logic has been set up, Legends units are always visible even if "Show Legends" is unchecked.
The logic needs to to be flipped so that the units are hidden if the Brood Brothers Auxilia Detachment is not chosen, rather than the other way around. Currently, the "unhide" from Brood Brothers is overriding the "hide" from the Legends flag.