Why does this save 4 values as one number even though it should only save 1 value?

I have a script in server script service which saves some values that are add to the player when they join. I'm saving those values to save purchases of a player. Btw FE is enabled

server script:

local dss = game:GetService("DataStoreService")
local ds1 = dss:GetDataStore("carSave")

local replicatedStorage = game:GetService("ReplicatedStorage")
local remoteSave = replicatedStorage:WaitForChild("RemoteSave")


game.Players.PlayerAdded:Connect(function(player)
    local ownCar1 = Instance.new("IntValue", player)
    ownCar1.Name = "Own1"
    local ownCar2 = Instance.new("IntValue", player)
    ownCar2.Name = "Own2"
    local ownCar3 = Instance.new("IntValue", player)
    ownCar3.Name = "Own3"
    local ownCar4 = Instance.new("IntValue", player)
    ownCar4.Name = "Own4"

    --getting data
    ownCar1.Value = ds1:GetAsync(player.UserId, ownCar1.Value) or 0
    ownCar2.Value = ds1:GetAsync(player.UserId, ownCar2.Value) or 0
    ownCar3.Value = ds1:GetAsync(player.UserId, ownCar3.Value) or 0
    ownCar4.Value = ds1:GetAsync(player.UserId, ownCar4.Value) or 0

    print("got data for "..player.Name)

    remoteSave:FireClient(player, ownCar1.Value, ownCar2.Value, ownCar3.Value, ownCar4.Value)   

end)


remoteSave.OnServerEvent:Connect(function(plr, own)
    if own == "car1" then
        plr.Own1.Value = 1
        ds1:SetAsync(plr.UserId, plr.Own1.Value)
        print(plr.Name.." saved data for car1")
    elseif own == "car2" then
        plr.Own2.Value = 1
        ds1:SetAsync(plr.UserId, plr.Own2.Value)
        print(plr.Name.." saved data for car2")
    elseif own == "car3" then
        plr.Own3.Value = 1
        ds1:SetAsync(plr.UserId, plr.Own3.Value)
        print(plr.Name.." saved data for car3")
    elseif own == "car4" then
        plr.Own4.Value = 1
        ds1:SetAsync(plr.UserId, plr.Own4.Value)
        print(plr.Name.." saved data for car4")
    end
end)


game.Players.PlayerRemoving:Connect(function(pl)
    print(pl.Own1.Value)
    print(pl.Own2.Value)
    print(pl.Own3.Value)
    print(pl.Own4.Value)
    ds1:SetAsync(pl.UserId, pl.Own1.Value)
    print(pl.Name.." saved data with "..pl.Own1.Value.." car1")
    ds1:SetAsync(pl.UserId, pl.Own2.Value)
    print(pl.Name.." saved data with "..pl.Own2.Value.." car2")
    ds1:SetAsync(pl.UserId, pl.Own3.Value)
    print(pl.Name.." saved data with "..pl.Own3.Value.." car3")
    ds1:SetAsync(pl.UserId, pl.Own4.Value)
    print(pl.Name.." saved data with "..pl.Own4.Value.." car4")
end)

and I also have a local script that is connected with this script using remote events. This local script basically allows players to purchase a car and when they do I want to fire server to change those values I have and save them

local script:

local player = game.Players.LocalPlayer
local replicatedStorage = game:GetService("ReplicatedStorage")

local remote1 = replicatedStorage:WaitForChild("Remote1")
local remote2 = replicatedStorage:WaitForChild("Remote2")
local remote3 = replicatedStorage:WaitForChild("Remote3")
local remoteSave = replicatedStorage:WaitForChild("RemoteSave")

local screenGui = script.Parent
local frame = screenGui:WaitForChild("Frame")
local carsFrame = screenGui:WaitForChild("carsFrame")
local purchase = frame:WaitForChild("PurchaseButton")
local cancel = frame:WaitForChild("CancelButton")

local car1Button = carsFrame:WaitForChild("car1Button")
local car2Button = carsFrame:WaitForChild("car2Button")
local car3Button = carsFrame:WaitForChild("car3Button")
local car4Button = carsFrame:WaitForChild("car4Button")


--purchasing cars
purchase.MouseButton1Click:Connect(function()
    if carToPurchase == "car1" then
        print("car1 successfully purchased")
        player.Character.Humanoid.WalkSpeed = 16
        frame.Visible = false
        purchaseSound:Play()
        car1Button.Visible = true
        remoteSave:FireServer("car1") --here it fires the server
    elseif carToPurchase == "car2" then
        print("car2 successfully purchased")
        player.Character.Humanoid.WalkSpeed = 16
        frame.Visible = false
        purchaseSound:Play()
        car2Button.Visible = true
        remoteSave:FireServer("car2")
    elseif carToPurchase == "car3" then
        print("car3 successfully purchased")
        player.Character.Humanoid.WalkSpeed = 16
        frame.Visible = false
        purchaseSound:Play()
        car3Button.Visible = true
        remoteSave:FireServer("car3")
    elseif carToPurchase == "car4" then
        print("car4 successfully purchased")
        player.Character.Humanoid.WalkSpeed = 16
        frame.Visible = false
        purchaseSound:Play()
        car4Button.Visible = true
        remoteSave:FireServer("car4")
    end
end)

remoteSave.OnClientEvent:Connect(function(own1, own2, own3, own4)
    print("getting data from server")

    if own1 == 1 then
        print(player.Name.." owns car1")
        car1Button.Visible = true
    end 
    if own2 == 1 then
        print(player.Name.." owns car2")
        car2Button.Visible = true
    end
    if own3 == 1 then
        print(player.Name.." owns car3")
        car3Button.Visible = true
    end
    if own4 == 1 then
        print(player.Name.." owns car3")
        car4Button.Visible = true
    end
end)

the variable carToPurchase isn't really important for this because it works good so i removed the part of a script where it's defined.

Anyways when i purchase "car1" it prints that i saved car1 but then when i join again it makes all 4 buttons visible so it appears it saved all 4 values as 1.

Any ideas how to fix it?