Value goes back up when you purchase something?

Hello! I have been creating a shop for the past few hours, but there's a problem: the money goes back up in a second after you purchase something. So, let's say there is something in the shop for 1 thousand cash, and you buy it and expect for your money to go down. Except the opposite happens. You have 5 thousand cash and you purchase the gear for 1 thousand. The money goes down to 4 thousand for a few seconds, then goes back to 5 thousand. I have a currency riser in the game, but it increases the value by 30 each 1 second. Heres the currency riser script:

while true do wait(1)
	player.leaderstats[valueName].Value = player.leaderstats[valueName].Value + 30
end

And heres the shop script:

script.Parent.MouseButton1Click:Connect(function()
	script.Parent.Parent.Parent.Parent.Parent.Clicked:Play()
	if game:GetService("Players").LocalPlayer.leaderstats["Money"].Value <= 1001 then
		game:GetService("Players").LocalPlayer.leaderstats["Money"].Value = game:GetService("Players").LocalPlayer.leaderstats["Money"].Value - 1000
		local balloon = game.Lighting.RedBalloon:Clone()
		balloon.Parent = game.Players.LocalPlayer.Backpack
	end
end)

All help will be appreciated! :)

If you change the values from a localscript it will only change the value from the client, you should use remote events to change the values from the server.

LocalScript

script.Parent.MouseButton1Click:Connect(function()
local replicatedstorage = game:GetService("ReplicatedStorage")
local PurchaseRemote = replicatedstorage.PurchaseRemote --Add a remoteevent into replicatedstorage named PurchaseRemote
    script.Parent.Parent.Parent.Parent.Parent.Clicked:Play()
    if game:GetService("Players").LocalPlayer.leaderstats["Money"].Value <= 1001 then
       PurchaseRemote:FireServer()
    end
end)

Normal Script

local replicatedstorage = game:GetService("ReplicatedStorage")
local PurchaseRemote = replicatedstorage.PurchaseRemote

PurchaseRemote.OnServerEvent:Connect(function(player)
	player.leaderstats.Money.Value = player.leaderstats.Money.Value - 1000
	local balloon = game.Lighting.RedBalloon:Clone()
        balloon.Parent = game.Players.LocalPlayer.Backpack
end)