Dax measures total mismatch in visual level

Excellove15 

I modified the table a bit

Target Timeseries_1 = 
SELECTCOLUMNS (
    GENERATE (
        TargetTimeSeries,
        DATESBETWEEN (
            Calendar_[Date],
            TargetTimeSeries[StartDate],
            TargetTimeSeries[EndDate] 
        )
    ),
    "DBName-PointID",TargetTimeSeries[Point_Id],
    //"Usage", TargetTimeSeries[Usage],
    "Dates",Calendar_[Date],
     "ID", FORMAT( Calendar_[Date], "MMMM yyyy") & "=" & TargetTimeSeries[Point_Id],
    "DBName",TargetTimeSeries[DBName],
    "Usage Per Day", DIVIDE( TargetTimeSeries[Usage], TargetTimeSeries[EndDate] - TargetTimeSeries[StartDate] + 1 )

)

and created another measure

Forecast - Target Units_2-new =
VAR Actuals =
    SELECTCOLUMNS(
ADDCOLUMNS(
SUMMARIZECOLUMNS(
    Calendar_[Month-Year],
    Points[DBName-Point_Id],
    "Act", SUM( DataInvoice[Units] )

), "ID", Calendar_[Month-Year] & "=" & Points[DBName-Point_Id]
), [ID]
)

VAR  FilterTargets = FILTER(
    'Target Timeseries_1',
    NOT ( 'Target Timeseries_1'[ID] IN Actuals )
)

VAR Targets = 
    CALCULATE(
        SUM( 'Target Timeseries_1'[Usage Per Day] ),
        FilterTargets

    )

RETURN
    Targets

Didn't test carefully, at least on some data both give the same result

On same data for existing measure

For new measure

As a comment, Calendar_ is not set as a date table and Auto date/time is ON in settings for this file. As result lot of hidden date tables in background. That also affects performance.