MDX Rank function

Question

I am having some trouble getting expected results when using the RANK function. My MDX is below with the result set that gets created. 
The [SF OCC Rank] results are correct but the [Net Rentals Rank] is not.  I am wanting to rank each of the measures to be able to identify which Site is ranked highest in [SF Occ %] and then which site is ranked highest in [Net Rentals].
My data has in total 43 sites.  In my filter I am limiting it to the Sites in [Site Groups].[Site Group Name].&[12].  There are only 14 sites that should display.  It looks like the [Net Rentals Rank] is ranking all 43 sites instead of
just the 14 that I am wanting. 
Any help is greatly appreciated.  Thanks!
WITH
MEMBER [Measures].[SF Occ Rank] as RANK(([Unit].[Site Name].CurrentMember),ORDER(([Unit].[Site Name].[Site Name].Members),[Measures].[SF Occ %], BDESC))
MEMBER [Measures].[Net Rentals Rank] as RANK(([Unit].[Site Name].CurrentMember),ORDER(([Unit].[Site Name].[Site Name].Members),[Measures].[Net Rentals], BDESC))
select {[Measures].[SF OCC %],[Measures].[SF Occ Rank],
           [Measures].[Net Rentals], [Measures].[Net Rentals Rank]} on COLUMNS,
    filter( [Unit].[Site Name].[Site Name].Members,[Site Groups].[Site Group Name].&[12]) on ROWS
from [CUBE]
where ( [Date].[Calendar].[Month of Year].&[201412],[Site Groups].[Site Group Name].&[12])

Answer 1

Hi rocko,
   You are correct the Net Rentals Rank will be calculated for all the Sites and will display the result for the current Sites being selected. Do some changes to the query so that you will get the ranks for only the sites you selected. 
WITH
MEMBER [Measures].[SF Occ Rank] as RANK(([Unit].[Site Name].CurrentMember),ORDER(([Unit].[Site Name].[Site Name].Members),[Measures].[SF Occ %], BDESC))
MEMBER [Measures].[Net Rentals Rank] as RANK([Unit].[Site Name].CurrentMember,ORDER( Exists( [Unit].[Site Name].[Site Name].Members,[Site Groups].[Site Group Name].&[12]),[Measures].[Net Rentals], BDESC))
select {[Measures].[SF OCC %],[Measures].[SF Occ Rank],
           [Measures].[Net Rentals], [Measures].[Net Rentals Rank]} on COLUMNS,
    Exists( [Unit].[Site Name].[Site Name].Members,[Site Groups].[Site Group Name].&[12]) on ROWS
from [CUBE]
where ( [Date].[Calendar].[Month of Year].&[201412],[Site Groups].[Site Group Name].&[12])
Regards,
Venkata Koppula