Can anyone help? Datastore script seems to add a level every time the player leaves and rejoins.

Yo, so my datastore script seems to have this issue where instead of saving the players level and exp, it for some reason jumps a level or two sometimes?? (for example: the players level would be 1, then once they leave and rejoin it becomes 2?)

Here is the code if anyone wants to know;

local DSService = game:GetService("DataStoreService"):GetDataStore("-test#1222")
local RunService = game:GetService("RunService")

game.Players.PlayerAdded:Connect(function(plr)
	local uniquekey = 'id-'..plr.userId
	local leaderstats = Instance.new("Folder", plr)
	local Level = Instance.new("NumberValue")
	local EXP = Instance.new("NumberValue")
	local MaxEXP = Instance.new("NumberValue")
	local Cash = Instance.new("NumberValue")
	local FactionEXP = Instance.new("NumberValue")
	
		local Strength = Instance.new("NumberValue")
		local Stamina = Instance.new("NumberValue")
		local Defence = Instance.new("NumberValue")
		local Quirk = Instance.new("NumberValue")
		local Points = Instance.new("NumberValue")
		
	local New =  Instance.new("BoolValue")

	leaderstats.Name = "Data"
	
	Level.Parent = leaderstats
	EXP.Parent = leaderstats
	MaxEXP.Parent = leaderstats
	Cash.Parent = leaderstats
	FactionEXP.Parent = leaderstats
	New.Parent = leaderstats
	
	Strength.Parent = leaderstats
	Stamina.Parent = leaderstats
	Defence.Parent = leaderstats
	Quirk.Parent = leaderstats
	Points.Parent = leaderstats
	
	Level.Name = "Level"
	EXP.Name = "EXP"
	MaxEXP.Name = "MaxEXP"
	Cash.Name = "Cash"
	FactionEXP.Name = "FactionEXP"
	
	Strength.Name = "Strength"
	Stamina.Name = "Stamina"
	Defence.Name = "Defence"
	Quirk.Name = "Quirk"
	Points.Name = "Points"
	
	New.Name = "New"
   
	Level.Value = 1
	EXP.Value = 0
	MaxEXP.Value = 100
	Cash.Value = 0
	FactionEXP.Value = 0
	New.Value = true
	
	Strength.Value = 0
	Stamina.Value = 0
	Defence.Value = 0
	Quirk.Value = 0
	Points.Value = 0


	local GetSaved = DSService:GetAsync(uniquekey)
	
	if GetSaved then
		Level.Value = GetSaved[1]
		EXP.Value = GetSaved[2]
		Cash.Value = GetSaved[3]
		FactionEXP.Value = GetSaved[4]
		New.Value = GetSaved[5]
		
			Strength.Value = GetSaved[6]
			Stamina.Value = GetSaved[7]
			Defence.Value = GetSaved[8]
			Quirk.Value = GetSaved[9]
			EXP.Value = GetSaved[10]
			Points.Value = GetSaved[11]
	else
		local NumberFS = {Level.Value,EXP.Value,Cash.Value,FactionEXP.Value,New.Value,Strength.Value,Defence.Value,Quirk.Value,Stamina.Value,MaxEXP.Value,Points.Value,}
		DSService:SetAsync(uniquekey,NumberFS)
	end
	

end)






game.Players.PlayerRemoving:Connect(function(plr)
	local uniquekey = "id-"..plr.userId
	local SaveTable = {plr.Data.Level.Value,plr.Data.EXP.Value,plr.Data.Cash.Value,plr.Data.FactionEXP.Value,plr.Data.New.Value,plr.Data.Strength.Value,plr.Data.Defence.Value,plr.Data.Stamina.Value,plr.Data.Quirk.Value,plr.Data.MaxEXP.Value,plr.Data.Points.Value}
	DSService:SetAsync(uniquekey, SaveTable)
	print("Number")
end)~~~~~~~~~~~~~~~~~

Heres my datastore:

local Ds = game:GetService("DataStoreService") -- access datastore
local abilites = Ds:GetDataStore("PlayerStats_00") -- Datastore key

function getPlayerData(player) -- load data
	local success, data = false, nil
	repeat
		success = pcall(function()
			data = abilites:GetAsync(player.UserId)
		end)
	until success
	
	player.IfData.Value = true
	
	return data
end

function saveData(player)
	if player.IfData.Value then
		local data = {}
		for i,v in pairs(player.leaderstats:GetChildren()) do
			table.insert(data, v.Value)
		end
		pcall(function()
			abilites:SetAsync(player.UserId, data)
		end)
	end
end

function loadStats(player)
	local leaderstats = Instance.new("Folder",player)
	leaderstats.Name = "leaderstats"
	
	local Credits = Instance.new("IntValue", leaderstats)
	Credits.Name = "Coins"
	
	local Wins = Instance.new("IntValue", leaderstats)
	Wins.Name = "Wins"
	
	local loaded = Instance.new("BoolValue", player)
	loaded.Name = "IfData"	
	
	local savefile = getPlayerData(player)
	if savefile then
		Credits.Value = savefile[1]
		Wins.Value = savefile[1]
	else
		Credits.Value = 0
		Wins.Value = 0
	end
end

game.Players.PlayerAdded:Connect(loadStats) -- When player joins load their stats
game.Players.PlayerRemoving:Connect(saveData) -- when player leaves save their stats

-- Auto-Saving (When game is releasing make an setting)
while wait(30) do
	for _, player in pairs(game.Players:GetPlayers())do
		saveData(player)
	end
end