RunningValue or RowNumber functions used in the cells of the {0} '{1}' refer to grouping scopes in both the columns and rows ...

RunningValue or RowNumber functions used in the cells of the {0} '{1}' refer to grouping scopes in both the columns and rows of the {0}.  The scope parameters of all RunningValue and RowNumber functions within a {0} can refer to row grouping or column groupings, but not both.