.net datagridview

I have a datagridview with 2 field in it. When I query a database for some reason it end up with more fields than I have selected and added to the grid.

Public Class InspectData
    Private Context As DataContext
    Private Sub InspectData_Load(sender As System.Object, e As System.EventArgs) Handles MyBase.Load
        'Connection settings
        Context = New DataContext(True)
        Using cf As New Util.ConnectionForm
            cf.ShowDialog()
            Context.Connect(cf.Server, cf.PortNumber, cf.Partition, cf.UserName, cf.Password)
        End Using

        Engine.Text = InspectStatus.engine.Text

        Engine.Text = "FD620DA00001"


        If String.IsNullOrEmpty(Engine.Text) Then
            Engine.Text = "Please Scan Engine Here."
        Else

            Dim location As String = "I"
            Dim columns = M_METPCols.M_ETDS + M_METPCols.M_EARL

            'retrieve engine scanned from engine master
            Dim troubles = Context.M_METP.RetrieveList(columns, M_METPExprs.M_EARL = "I")

            Engine.Text = "FD620DA00001"

            ' Display the result in the grid view
            Me.TroubleCodes.DataSource = troubles

        End If

    End Sub

End Class
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