Load/Save Game Issues, can't create new game.

I have a world manager script that controls pretty much everything, right now it all works and allows me to play through and checkpoint etc.. problem is: when I get to the last level and want to restart the game by death it loads my last checkpoint in level 3. im not sure how to re-write the variables for the new game state to make it start at level 1 again once they have been saved. I'm pretty new to StreamWriter so im stumped!

here is my code for the world manager

 ///////////////////////////////////////////////////////////////
 // SAVE / LOAD SYSTEM
 ///////////////////////////////////////////////////////////////
 static public function SaveGame( )
 {
     //  open the file for writing
     var file = new StreamWriter( Application.dataPath + "/Saves/SavedGame.txt");
     
     file.WriteLine( currentLevel );        // write the level the Player is on to the file
     file.WriteLine( CurrentSpawnPointIndex );        // write the Player SpawnPoint to the file
     
     // check if if the player exists so the information can be stored in the file
     if (GameObject.FindWithTag("Player"))
     {
         // grab the Stat file to grab the information
         var PlayerStats:PlayerStats = (GameObject.FindWithTag("Player").GetComponent("PlayerStats"));
                 file.WriteLine(PlayerStats.GetHealth());// write the health of the Player to the file
                 file.WriteLine(PlayerStats.GetAmmo(0));// write the Primary Ammo of the Player to the file
                 file.WriteLine(PlayerStats.GetAmmo(1));// write the Secondary Ammo of the Player to the file
     }
     
     // write the Mission status to the file
     file.WriteLine( Missions[0] ); //level1
     file.WriteLine( Missions[1] ); //level2
     file.WriteLine( Missions[2] ); //level3
 
 
     
     // make sure to write the information to the file
     file.Flush();
     
     // close the file
     file.Close();
     
 }
 
 public function SetStats( PlayerHealth : int ,AmmoPrime : int, AmmoAlt : int)
 { 
     var PlayerStats : PlayerStats = GameObject.FindWithTag("Player").GetComponent("PlayerStats");    
     PlayerStats.AddHealth(PlayerHealth, 0);
     PlayerStats.AddAmmo(0,AmmoPrime, 0);
     PlayerStats.AddAmmo(1,AmmoAlt, 0);
 }
 
 public function Initialize()
 {
     // set the state to Playing
     SetLevelState("Playing"); // used when working with coded buttons
     
     // load saved gameinfo if exists
     if( !Directory.Exists( "Assets/Saves/" ) )
     {    
         // if the directory doesnt exist, create it
         Directory.CreateDirectory( "Assets/Saves/" );
     }  
     
     // check to see if the file exists before tryign to read information
     if (File.Exists(Application.dataPath + "/Saves/SavedGame.txt"))
     {
         // file exists, open the file for reading
             var file = new StreamReader( Application.dataPath + "/Saves/SavedGame.txt");
 
         
         // read the information stored in the file and store them in variables
         currentLevel = parseInt(file.ReadLine());
         CurrentSpawnPointIndex = parseInt(file.ReadLine());
         PlayerHealth = parseInt(file.ReadLine());
         AmmoPrime = parseInt(file.ReadLine());
         AmmoAlt = parseInt(file.ReadLine());
         Missions[0] = parseInt(file.ReadLine());
         Missions[1] = parseInt(file.ReadLine());
         Missions[2] = parseInt(file.ReadLine());
         
         
         
         
         
         // close the file
         file.Close();
     }
     // file doesn exists, so create it with default values (New Game)
     else
     {
         // set default values for the New Game being created
         
         
         
         
         
         // open the file for Writing
         
     
         
         
         
         
         
         // write the information to the file
         
         
         
         
         
     }
     
     // load levels with the default or loaded values
     LoadingLevels();
     
     while(1)
     {
         var SpawnPlace : GameObject = GameObject.FindWithTag("spawnPoint" + CurrentSpawnPointIndex);        
         
         if(Application.GetStreamProgressForLevel(currentLevel) == 1 && SpawnPlace != null)
         {
             SpawnPlayer(CurrentSpawnPointIndex);
             SetStats(PlayerHealth, AmmoPrime, AmmoAlt);
             break;
         }
         else
         {
             yield WaitForSeconds(1);
         }
     }
     
 }
 
 //function used to load levels when game starts
 function LoadingLevels()
 {
     // check mission 1 status, if its not done, load level 1
     if(!Missions[0])
     {
         Application.LoadLevel(currentLevel);
     }
     
     // check mission 2 status, if its not done, load level 1 and 2
     else if(!Missions[1])
     {
         Application.LoadLevel(currentLevel);
         Application.LoadLevelAdditiveAsync(currentLevel+1);
             
                 
         Debug.Log("Loading Level 1");
     }
     // check mission 3 status, if its not done, load level 1, 2 and 3
     else if(!Missions[2])
     {
         Application.LoadLevel(currentLevel);
         Application.LoadLevelAdditive(currentLevel - 1);
         
         Debug.Log("Loading Level 2");
     }
     
 }
 
 //frontend
 function OnGUI()
 {
     if (Application.loadedLevel == 0 ) // start a New Game
     {
         // Create the Start button through code.
         if(GUI.Button(Rect(Screen.width - Screen.width/2, Screen.height - Screen.height/2, 180, 20), "New Game/ Continue"))
         {
             // start the game from where the player last did well
             Initialize();
         }
     }
     else if (levelState == "Dead") // is the Player dead
     {
         // Create the Load Last Checkpoint button through code
         if(GUI.Button(Rect(Screen.width - Screen.width/2, Screen.height - Screen.height/2, 180, 20), "Load last checkpoint"))
         {
             // start the game from where the player last did well
             Initialize();
         }
         
         // Create the Go to Main Menu button through code
         if(GUI.Button(Rect(Screen.width - Screen.width/2, Screen.height - Screen.height/2 + 30, 180, 20), "Go To Main Menu"))
         {
             // load the Start Screen
             Application.LoadLevel(0);
         }
     }
 }
 
 static public function MissionStatusCheck (missionIndex : int)
 {
     // what is the status of the mission
     return Missions[missionIndex];
 }
 
 // function is used to change the mission status, was it passed?
 static public function SetMissionStatus( missionIndex : int, status : int)
 {
     // status in the array is updated
     Missions[missionIndex] = status;
 }
 
 //changing level states
 static function SetLevelState(newState : String)
 {
     levelState = newState;
 }
 
 static public function SetCheckPoint( newCheckPoint : int )
 {
     CurrentSpawnPointIndex = newCheckPoint;
 }
 
 static public function SetCurrentLevel (newLevel : int)
 {
     currentLevel = newLevel;
 }