I just went and played with dun & smokey in the genetics calculator:
http://kippenjungle.nl/chickencalculator.html
It looks like dun is dominant. So if a chick inherits dun from an Aloha mother, and not from the Ayam Cemani father, that chick would show dun.
It looks like smoky is recessive. So if a chick inherits smoky from an Aloha mother, and not from the Ayam Cemani father, that chick would not show smoky.
For the Aloha hens where one shows grayish and the other brownish feathers, they could have different dilution genes. Or they could both have the same dilution gene, and it looks different because of something else different. I don't know what the "something else" might be, but I know that blue chickens can come in a variety of shades-- maybe dun can too?
You mentioned dun and smoky. Is there any chance that one of your Alohas has blue? Or chocolate? Each of them also dilutes black to a gray or brown shade. I don't know which genes are even a possibility in Alohas, given how new they are.
I am assuming the Ayam Cemani is black not dun, and that he does not carry smoky.