ติดปัญหาเรื่อง DataGridView แสดงข้อมูลแบบ Double ครับ

Private Sub BindDataGridB()

        Dim dt As New DataTable
        Dim Adapter As SqlDataAdapter

        objConn = New SqlConnection(strConnString)
        objConn.Open()

        objCmd = New SqlCommand
        objCmd = objConn.CreateCommand()
        objCmd.CommandText = "SELECT [buy].idbuy,[buy].nobill,[buy].amount,[buy].price,[buy].total,[buy].pay,[buy].type,[buy].day,[buy].month,[buy].year,[buy].time,[customer].name FROM [buy] INNER JOIN [customer] ON [buy].idcus = [customer].idcus"
        objCmd.CommandType = CommandType.Text

        Adapter = New SqlDataAdapter(objCmd)
        Adapter.Fill(dt)

        objConn.Close()

        Me.dgvB.DataSource = dt
        Me.dgvB.Columns.Clear()

        Dim column As DataGridViewTextBoxColumn

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "idbuy"
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "nobill"
        column.HeaderText = "เลขที่บิล"
        column.Width = 100
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "name"
        column.HeaderText = "ชื่อ-นามสกุล"
        column.Width = 200
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "amount"
        column.HeaderText = "จำนวน"
        column.Width = 60
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "price"
        column.HeaderText = "ราคา"
        column.Width = 80
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "total"
        column.HeaderText = "รวม"
        column.Width = 80
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "time"
        column.HeaderText = "เวลา"
        column.Width = 60
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "pay"
        column.HeaderText = "ชำระเงิน"
        column.Width = 90
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "type"
        column.HeaderText = "ประเภท"
        column.Width = 60
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "day"
        column.HeaderText = "วันที่"
        column.Width = 60
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "month"
        column.HeaderText = "เดือน"
        column.Width = 60
        Me.dgvB.Columns.Add(column)

        column = New DataGridViewTextBoxColumn()
        column.DataPropertyName = "year"
        column.HeaderText = "ปี"
        column.Width = 60
        Me.dgvB.Columns.Add(column)

        dt = Nothing

        Me.dgvB.Columns(0).Visible = False

    End Sub