Not Inserting Blank Rows Between Data as Expected

[Ark68]

I have this range of data ..

Excel 2010
	R
13	CR
14	CR
15	CR
16	CR
17	DR
18	DR
19	DR
20	DR
21	DR
22	DR
38	FR
39	FR
MasterWKSH

(I have intentionally hidden some rows for the ease of presentation)

I need to insert blank rows between two different values in R. For example, between rows 16 and 17 (CR and DR) and 22 and 23 (DR and FR). I am using this code:

'** INSERT SEPARATOR ROWS
    
        Dim r As Long, mcol As String, h As Long

        ' find last used cell in Column A
        r = Cells(Rows.Count, "R").End(xlUp).Row

        ' get value of  last used cell in column A
        mcol = Cells(r, 1).Value

        ' insert rows by looping from bottom
        For h = r To 2 Step -1
            If Cells(h, 1).Value <> mcol Then
                mcol = Cells(h, 1).Value
                Rows(h + 1).Insert
            End If
        Next h

The result is a row inserted between every between all rows. Every second row is empty. Data row, empty row, data row, empty row etc...