Solved Scoreboard can't show the number 1 apparently

I have a scoreboard that shows the player's credits.
Each time I kill a zombie, I gain 1 credit.
The scoreboard gets updated each 2 seconds.

Code for killing zombie:

Code:

    @EventHandler
public void onZombieKill(EntityDeathEvent e) {
        LivingEntity entity = e.getEntity();
        if(e.getEntity() instanceof Zombie) {
            if(entity.getKiller() instanceof Player) {
                Bukkit.broadcastMessage(entity.getKiller().getName() + " killed a Zombie");
                getPlayerCurrency().set(entity.getKiller().getUniqueId().toString(), getPlayerCurrency().getInt(entity.getKiller().getUniqueId().toString()) + 1);
                plugin.savePlayerCurrency();
            }
        }
}

Code for showing scoreboard:

Code:

private void setupScoreboard(Player p) {
        ScoreboardManager sm = Bukkit.getScoreboardManager();
        Scoreboard onJoin = sm.getNewScoreboard();
        Objective o = onJoin.registerNewObjective("test", "dummy");
   
        o.setDisplaySlot(DisplaySlot.SIDEBAR);
        o.setDisplayName("" + ChatColor.GREEN + ChatColor.BOLD + "ServerName");
   
        Score spacer = null;
        Score spacer2 = null;
        Score spacer3 = null;
   
        Score nameTitle = null;
        Score name = null;
        Score currencyTitle = null;
        Score currencyBalance = null;
        Score playersTitle = null;
        Score players = null;
   
        try {
       
       
            spacer = o.getScore(ChatColor.AQUA + "----------------");
            spacer.setScore(9);
       
            nameTitle = o.getScore("" + ChatColor.YELLOW + ChatColor.BOLD + "Name:");
            nameTitle.setScore(8);
       
            name = o.getScore(p.getName());
            name.setScore(7);
       
            spacer2 = o.getScore(ChatColor.BLACK + "");
            spacer2.setScore(6);
       
            currencyTitle = o.getScore("" + ChatColor.GOLD + ChatColor.BOLD + "Balance:");
            currencyTitle.setScore(5);
       
            currencyBalance = o.getScore(getPlayerCurrency().getInt(p.getUniqueId().toString()) + "");
            currencyBalance.setScore(4);
       
            spacer3 = o.getScore("");
            spacer3.setScore(3);
       
       
            playersTitle = o.getScore("" + ChatColor.DARK_GREEN + ChatColor.BOLD + "Players online:");
            playersTitle.setScore(2);
       
            players = o.getScore(Bukkit.getOnlinePlayers().size() + "");
            players.setScore(1);
       
       
            p.setScoreboard(onJoin);
       
        } catch(Exception ex) {
            System.out.println(ex);
        }
   
}

Code actually starting the scoreboard:

Code:

Bukkit.getServer().getScheduler().scheduleSyncRepeatingTask(this, new Runnable(){
    public void run(){
        for(Player p : Bukkit.getOnlinePlayers()){
            setupScoreboard(p);
         }
    }
}, 40, 40);

But the actual balance just disappears when the credit-integer is at 1. It shows up again when it's at 2 and shows every other number.

What is wrong? Why can't it show the number 1?

 

@Condolent
You need to make sure that there aren't any scores with the same name (e.g. when the online player size is 1 and the balance is 1 they have the same name). You can do this, for example, by putting colors before/after it.

 

@megamichiel ahhh sh!t, totally forgot about that. God damnet..
Thank you! xd