Does this work? I've changed it to only look at column 2 for deleting duplicates and only look at column 3 for your word count. Is that right?
Code:
Public Sub DeleteDuplicatesCol2()
Dim xTable As Table, xRow As Range, xStr As String, xDic As Object
Dim I As Long, J As Long, KK As Long, xNum As Long, iRow As Long, iRows As Long
Dim aRng As Range, cRng As Range, lWords As Long, lRows As Long, aCell As Cell
'Application.ScreenUpdating = False
Set xDic = CreateObject("Scripting.Dictionary")
If Selection.Tables.Count = 0 Then
MsgBox "Macro must be run when a table is selected"
Exit Sub
Else
Set xTable = Selection.Tables(1)
iRows = xTable.Rows.Count
For I = iRows To 4 Step -1
Set aRng = xTable.Cell(I, 2).Range
For iRow = 4 To I - 1
Set cRng = xTable.Cell(iRow, 2).Range
If aRng.Text = cRng.Text Then
xTable.Rows(I).Delete
lRows = lRows + 1
Exit For
End If
Next iRow
Next I
End If
Set aRng = ActiveDocument.Range(xTable.Rows(4).Range.Start, xTable.Range.End)
For Each aCell In aRng.Cells
If aCell.ColumnIndex = 3 Then lWords = lWords + aCell.Range.Words.Count - 1
Next aCell
Application.ScreenUpdating = True
MsgBox "Word count in column 3: " & lWords
End Sub