It sounds like you're referring to the TemplateAddRow.  If this is the case, you could set the AllowAddNew property to control this behavior, i.e.

private void ultraGrid1_InitializeLayout(object sender, Infragistics.Win.UltraWinGrid.InitializeLayoutEventArgs e)
{
    e.Layout.Override.AllowAddNew = Infragistics.Win.UltraWinGrid.AllowAddNew.TemplateOnTop;
}

-Matt