Measure calculating Conditional SUM according to Values from another Table Not Filtering As Expected

I have a Production Table with Tons and Meters and I have an Asset Table with a Site Column and an Asset Group Type Column. I've got a requirement for a measure to show Tons for certain Asset Group Types and show Meters for other Asset Group Types. I've been able to do a DAX query that does this, but if I try and slice on Site, my values of production (tons and meters) don't slice, they only show the total. There is a relationship between the Production Table and the Asset Table on Site. Here is my DAX query for the calculated measure on my Production table.
 

Tons/Meters =
IF (
VALUES ( Asset[AssetGroupType] ) IN { "AssetType1", "AssetType2" },
SUM ( Production[Tons] ),
SUM ( Production[Meters] )
)

 Production Table:

Asset Table: