An extra line shows up when there is no copy in the selected holdings scope and the Show Copy Detail checkbox is deselected. See the screenshot. No such a line when there is, at least, a copy in the selected holdings scope.
An extra line shows up when there is no copy in the selected holdings scope and the Show Copy Detail checkbox is deselected. See the screenshot. No such a line when there is, at least, a copy in the selected holdings scope.