i am working on wicket, where i am supposed to show my data's under

<tr>
   <td>Name</td>
   <td>Single Player Score</td>
   <td>Double Player Score</td>
   <td>Total Score</td>
</tr>
<tr wicket:id="data">
   <td wicket:id="name"></td>
   <td wicket:id="singlePlayerScore"></td>
   <td wicket:id="doublePlayerScore"></td>
   <td wicket:id="totalScore"></td>
</tr>

My Player model class is as: Player class with attributes singlePlayerScore, doublePlayerScore(), name with getter and setter and also a list data obtained from database.

Data from SQLQuery is as;

name        score    gamemode
  A           200       singlePlayerMode 
  A           100       doublePLayerMode
  B           400       singlePlayerMode 
  B           300       doublePLayerMode
dataList == player.getScoreList();

My PageableListView is as:

     final PageableListView listView = new PageableListView("data",dataList,10){
@Override
protected void populateItem(Item item){
    player = (Player)item.getModelObject();
    item.add(Label("name",player.getName()));
    item.add(Label("singlePlayerScore",player.getName()));
    item.add(Label("doublePlayerScore",player.getName()));
    item.add(Label("totalScore",String.valueOf(player.getSinglePlayerScore()+player.getDoublePlayerScore())));
  }
}

My Problem is as: What view i get is as:

Name         single Player Score               Double Player Score       Total Score
A              0                                  100                      100
A              200                                 0                       200
B              0                                   300                     300
B              400                                  0                      400

How do i achieve below view on my webpage?

 Name         single Player Score               Double Player Score       Total Score
    A              200                                  100                     300
    B              400                                  300                     700

Please help me as to why is this happening? I guess my list has size four that's one reason why as to it is rendering the view? So what can i do to get as require rendering view?