Total & Average Hours

As the totals in the matrix weren't correct I created a summarizecolumns(table) and placed the Averages in cards which display the correct numbers and update correctly depending on the request num selected. But unfortunately still don't work in the matrix visual(summarize table).

Earliest TaskStartedDt = MINX(
                                            KEEPFILTER(BoardingData[StartedDt])),
                                           CALCULATE(MIN(BoardingData[Startdt])))

Duration HR = DATEDIFF([Earliest TaskStartedDt],NOW(),HOUR())
Duration WK = DATEDIFF([Earliest TaskStartedDt],NOW(),Week())

New Hrs = SUMMARIZECOLUMNS(BoardingData[RequestNum],BoardingData[PhaseTxt],
                                                        "StartDate",MIN(BoardingData[StartedDt],
                                                        "Hrs",[Duration HR],
                                                       "Weeks", [Duration Wk])

Count = COUNTROWS('New Hrs',[PhaseTxt])
Sum Hrs = SUM('New Hrs'[Hrs])
Sum Wk = SUM('New Hrs'[Weeks])
AVG Duration WK = DIVIDE([Sum Wk],[Count])
AVG Duration Hrs = DIVIDE([Sum Hrs],[Count])