JavaFX 2.0 :: Only One Change Event On ObservableList?

I have a list of Row objects and want to listen to changes in the name property of a Row object.
 
public class Row implements Serializable {
    private final SimpleStringProperty name = new SimpleStringProperty(this, "name", "");
    public Row() {
        this("");
    }
    public Row(String name) {
        this.name.set(name);

[Code] ....
 
I would expect to be notified 4 times. Line 23: Added, Line25, 26, 27: Update

But there are only 2 change events. For Line 26 and 27 there is no change event.