For the reference COMCTL32's ListView control pushing the PAGE-DOWN key causes the selection of the last visible item. For FX's ListView it works different: sometimes it selects the item next to visible (depending on box size, number of items, swelection state, etc.)
Sample to check. To reproduce move the selection mark to item 8, using CTRL-DOWN key, select it by SPACE key, move the selection mark to item 4 using CTRL-DOWN key and then press the PAGE-DOWN key. The item 9 will be selected instead of item 8.

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.HBox;
import javafx.stage.Stage;

public class App extends Application {

    public static void main(String[] args) {
        launch(args);
    }

    @Override
    public void start(Stage stage) throws Exception {
        ListView<String> list = new ListView<String>();
        list.getSelectionModel().setSelectionMode(SelectionMode.MULTIPLE);
        list.setMaxSize(210, 210);
        for (int i = 0; i < 10; i++) {
            list.getItems().addAll(String.valueOf(i));
        }
        Scene scene = new Scene(new HBox(list));
        stage.setScene(scene);
        stage.show();
    }
}