This doesn't seem to make any sense as it is representing the ADC modules in the processors as devices that conflict, when they do not. There's currently nothing in the help file that describes this nor is this restriction inherent in the processor itself.
I thought that pin sharing required some fancy footwork; I currently have it setup on both modules, and it sys "peripheral must be set and initialized in another module" when it IS initialized and set up in another module.
It seems curious that such bus signals should have peripheral restrictions levied on them.