Facebook Data Reach

Hey, 

I was able to get FB Page Data. download to match Daily Total Reach = SM Total reach and Daily Paid REach = SM PAid REach but was unable to get Organic Reach to match anything. 

Is there any workaround that?

Am I also wondering why when I roll it up under just month (not breaking down by day) as we are doing monthly reporting the numbers are different the sum of each day for the month?