Cumulative Sum Stops Working with Other Filter Condition

Objective

I am trying to calculate the cumulative value of a number, using dates as a measure of progress, n = day1, n1 = day1+day2 etc., and apply a secondary filter.

Problem

When adding in another filter, beyond the date, the cumulative sum stops working, returning only the value for the earliest date - or not at all. 

Actions so Far

I have tried using variations of `KEEPFILTER` and `ALLSELECTED` to see if I could get the secondary filter to apply, but these didnt work. 

Details

The cumulative count of Actuals works just fine on its own: 

But as soon as I add the Cost Type column `ActualsCum` only returns a value for the first date for 2 of the 3 Cost Types (Internal has no values). 

`Actuals` still works, which is what leaves me most confused as `ActualsCum` is using `Actuals`. 

Here are the measures in question:

Actuals = 
// get the actuals from Transactions table for all providers

    VAR internal = 
        CALCULATE(
            SUM(factTransactions[Amount]),
            USERELATIONSHIP(factTransactions[Reporting Date], dimCalendar[DateID]),
            factTransactions[Journal Type] = "G"
        )


    VAR external = 
        CALCULATE(
            SUM(factTransactions[Amount]),
            USERELATIONSHIP(factTransactions[Reporting Date], dimCalendar[DateID]),
            factTransactions[Journal Type] = "P"
        )

    RETURN (internal + external) * -1  // finance use negative numbers, so flip to positive

ActualsCum = 
    // cumulative Actuals

    CALCULATE(
        [Actuals],
        USERELATIONSHIP(factTransactions[Reporting Date], dimCalendar[DateID]),
        FILTER(
            ALL(dimCalendar),
            dimCalendar[DateID] <= MAX(dimCalendar[DateID])
        )
    )

Sample data

factTransactions

dimCostType

The `dimCalendar` table is a long series of dates, 1 date per day. 

Any help with this would be greatly appreciated.