Pivot table does not display average correctly

Erdi88 , I guess that's with measures since we have to calculate such average of average. Let me illustrate on example.

Creating PivotTable add data to data model, here add measure (with Power Pivot or through right click on PivotTable)

Average AA:=VAR
	tbl =GROUPBY(
		GROUPBY(
		  Table1,
		  Table1[A],
		  Table1[B],
		  "Average B", AVERAGEX(CURRENTGROUP(),Table1[V])
		),
		Table1[A],
		"Average A", AVERAGEX(CURRENTGROUP(),[Average B]))
RETURN
	DIVIDE(SUMX(tbl,[Average A]),DISTINCTCOUNT(Table1[A]))

That's first column in above Pivot Table which gives correct result.

More simple measure

Average A:=VAR
	tbl =GROUPBY(
		Table1,
		Table1[B],
		"Average B", AVERAGEX(CURRENTGROUP(),Table1[V])
	)
RETURN
	AVERAGEX(tbl,[Average B])

but gives average on all V for Grand Total.

Last column is  the "standard" average.