Current javadoc for setRightAnchor states that it sets the bottom anchor, but it actually sets the right anchor.

public static void setRightAnchor(Node child, java.lang.Double value)

Sets the bottom anchor for the child when contained by an anchorpane.

http://docs.oracle.com/javafx/2/api/javafx/scene/layout/AnchorPane.html#setRightAnchor%28javafx.scene.Node,%20java.lang.Double%29