How to get the list of duplicated values in a range

Question

I tried recording the macros but it's using copying and pasting, but I prefer the codes to be dynamic as the range of my data changes weekly.

I have 2 columns, A & D. Column A is a pivot table, so I think, maybe that's why VBA codes for moving down rows don't work. (error for trying to move pivot table). I want Column D to be a list of unique duplicates that are from column A and condense it so no gaps.

So far I can extract the unique duplicates and condense them but the results are pasted it from D1 instead of D8. So I need help to bring down the values 8 rows. Now I don't want to copy and paste the pivot table as values or trying to get rid of it since I need the pivot table there as I can just refresh it every week for new list.

Any suggestion or advice is appreciated.

    Sub dp()

    AR = Cells(Rows.Count, "A").End(xlUp).Row

    For Each p1 In Range(Cells(8, 1), Cells(AR, 1))
        For Each p2 In Range(Cells(8, 1), Cells(AR, 1))
            If p1 = p2 And Not p1.Row = p2.Row Then
                Cells(p1.Row, 4) = Cells(p1.Row, 1)
                Cells(p2.Row, 4) = Cells(p2.Row, 1)
            End If
        Next p2
    Next p1
    Columns(4).RemoveDuplicates Columns:=Array(1)
        Dim lastrow As Long
        Dim i As Long
        lastrow = Range("D:D").End(xlDown).Row

        For i = lastrow To 1 Step -1

        If IsEmpty(Cells(i, "D").Value2) Then

            Cells(i, "D").Delete shift:=xlShiftUp
        End If
    Next i
End Sub

Answer 1

Here is a different approach

Sub dp()

Dim AR As Long, p1 As Range, n As Long

AR = Cells(Rows.Count, "A").End(xlUp).Row
n = 8
With Range(Cells(8, 1), Cells(AR, 1))
    For Each p1 In .Cells
        If WorksheetFunction.CountIf(.Cells, p1) > 1 Then
            If WorksheetFunction.CountIf(Columns(4), p1) = 0 Then
                Cells(n, "D") = p1
                n = n + 1
            End If
        End If
    Next p1
End With

End Sub

Answer 2

here's another approach:

Option Explicit

Sub main()
    Dim vals As Variant, val As Variant
    Dim strng As String

    With Range(Cells(8, 1), Cells(Rows.count, 1).End(xlUp))
        vals = Application.Transpose(.Value)
        strng = "|" & Join(vals, "|") & "|"
        With .Offset(, 3)
            .Value = Application.Transpose(vals)
            .RemoveDuplicates Columns:=1, Header:=xlNo
            For Each val In .SpecialCells(xlCellTypeConstants)
                strng = Replace(strng, val, "", , 1)
            Next val
            vals = Split(WorksheetFunction.Trim(Replace(strng, "|", " ")), " ")
            With .Resize(UBound(vals) + 1)
                .Value = Application.Transpose(vals)
                .RemoveDuplicates Columns:=1, Header:=xlNo
            End With
        End With
    End With
End Sub