[Wannier] unit cell and formula unit

[Young-Joon Song]

Dear users and developers  Hello.   I’d like to ask a question related to the unit cell used in the Wannier90 code. Recently, I study on rhombohedral structure system. 
This structure can transform to hexagonal one. In my case, the difference of formula unit between rhombohedral cell and hexagonal cell is three times.
 After DFT calculation using WIEN2K code, I got MLWFs of both cases separately. Then I calculated the anomalous Hall conductivity with ‘postw90.x’. 
Here is my question. Why are these values of the anomalous Hall conductivity similar in both cases of rhombohedral cell and hexagonal cell even their formula units are not same.
 I think these values should be different by three times.   Any comment is very helpful for me.   Thank you in advance.
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