Why does this script think that a player has a ShopGui when they don't?

So basically I was doing a shop that would pop up when the player would click a dummy in workspace. So I used a ClickDetector and made a ShopGui which I inserted in the dummy.

The Script in the dummy looks like this:

local clickDetector = script.Parent.ClickDetector
local gui = script.Parent.ShopGui

clickDetector.MouseClick:Connect(function(player)
    if not player.PlayerGui:FindFirstChild("ShopGui") then
        print("Cloning...")
        local clone = gui:Clone()
        clone.LocalScript.Disabled = false
        clone.Parent = player.PlayerGui
    else
        print("lolwut")
    end
end)

The LocalScript in the GUI looks like this:

local gui = script.Parent.Frame
local buy = gui.Buy
local sell = gui.Sell
local exit = gui.Exit

exit.MouseButton1Click:Connect(function()
    script.Parent:Destroy()
end)

After the first time clicking the dummy the ShopGui appears in the player's PlayerGui and prints "Cloning...". Then it always prints "lolwut" no matter if the ShopGui is there or not. I'm stuck.