Is my save stats script wrote incorrectly? It does not seems to be working correctly, Why?

I have a save stats script, but it does not work right! It saves my point but does not save my rebirth, why? For example, if I have 100 points, and I rebirth, and I left the game, and later if I join back it will say I have 100 points and 0 rebirths, why? Another problem is that, whenever I rebirth and it will clear my points and give me 1 rebirth, but when I click on a block that gives me points, it automatically start me with 100 points, why? For example, if I rebirth I will have 1 rebirth and it will clear my points, but when I click on a block that gives me 2 points, I will automatically have 102 points, why?

Here is the save stats script

function onPlayerEntered(player)
wait()
player:WaitForDataReady()
repeat wait() until player:FindFirstChild("leaderstats")
if player.DataReady then
if player:findFirstChild("leaderstats") then
local score = player.leaderstats:GetChildren()
for i = 1,#score do
local ScoreLoaded = player:LoadNumber(score[i].Name)
wait()
if ScoreLoaded ~= 0 then
score[i].Value = ScoreLoaded
end
end
end
end
end

function onPlayerLeaving(player)
if player:findFirstChild("leaderstats") then
local score = player.leaderstats:GetChildren()
for i = 1,#score do
player:SaveNumber(score[i].Name,score[i].Value)
end
end
end

game.Players.PlayerAdded:connect(onPlayerEntered)
game.Players.PlayerRemoving:connect(onPlayerLeaving)

Here is the leaderstats script

game.Players.PlayerAdded:connect(function(player)
     local leaderstats = Instance.new("Model")
     leaderstats.Name = "leaderstats"
     leaderstats.Parent = player

     local money = Instance.new("IntValue")
     money.Name = "LifeFormFound" 
     money.Value = 0
     money.Parent = leaderstats


     local Points = Instance.new("IntValue")
     Points.Name = "Rebirth"
     Points.Value = 0
     Points.Parent = leaderstats 
 end)