Currency Conversion (Multiple Sources, Multiple Targets) - Fact Table w/ Two Dates, Two Amounts

I replaced the DAX FILTERs with the TREATAS functions and I'm getting the expected results at the transactional level but no value is being returned at the Totals level. The Transaction Amt Rev* field contains the FILTER logic and that is returning a value at the the Totals level.

UPDATE:

The above table screenshot is being filtered down to _CURRENCY_REVENUE = 'CAD'. When I remove this filter, a total amount is now being shown but still incorrect. The amount shown is the total only for the records where _CURRENCY_REVENUE = 'GBP' as no currency conversion is actually happening because the target currency to be converted to is GBP. 

(No Filter)

(_CURRENCY_REVENUE = GBP)

Also, I noticed that when I remove _CURRENCY_REVENUE_DIM_CALENDAR_ID field from the table that some of the values for the z_Amt Rev Curr(contains TREATAS logic) disappear. The values that do remain are for _CURRENCY_REVENUE equal to GBP, which no conversion is happening, or where there is only one transactional record for a given currency ISO code such as with DKK or HUF. Either way there seems to be an impact to the z_Amt Rev Curr value when the granularity is changed to a higher level. Perhaps this is related to the granularity/filter context of the DAX written above in the original post with the ADDCOLUMNS/SUMMARIZE DAX pattern which is at the _CURRENCY_REVENUE_DIM_CALENDAR_ID and _CURRENCY_REVENUE level? I guess I wouldn't expect this to happen as the currency conversion is calculated at the correct level but not able to be aggregated up to a Totals level that I thought would happen through the SUMX.