Music Duplicates itself??

I created a Music thing for my holo in case trainers wanted to have music in their trainings. I know most of them want music. So I decided to add music into the holo depending on the map loaded. When you load the first map (load.sft) it works perfectly fine...until you load the second one. When you do, the sound duplicates itself, yet there is only one Sound object!! Is this ROBLOX's problem? Or did I screw it up somehow?

Here is the code inside the sound:

game.Workspace.Music.Changed:connect(function(v)
	if v == true then
		script.Parent:Play()
	elseif v == false then
		script.Parent:Stop()
	end
end)

script.Parent.Changed:connect(function(v)
	if v == "SoundId" and v.SoundId == "http://roblox.com/asset/?id=193160512" then --You got a problem with Portal 2 music?
		script.Parent.Pitch = math.random(15, 20)/10
	elseif v == "SoundId" and v.SoundId == "http://roblox.com/asset/?id=146320539" then
		script.Parent.Pitch = math.random(75, 125)/100
	elseif v == "SoundId" and v.SoundId == "http://roblox.com/asset/?id=149228598" then
		script.Parent.Pitch = math.random(15, 20)/10
	else
		script.Parent.Pitch = 1
	end
end)

The Module script in workspace. It runs inside ServerScripts in a map that is in a model:

local module = {}

module.Ready = function(track)
	workspace.MusicSound:Stop()
	workspace.MusicSound.SoundId = track.SoundId
	wait(1)
	if workspace.Music.Value then
		workspace.MusicSound:Play()
	end
end

return module

game.Workspace.Music.Changed:connect(function(v)
    if v == true then
        script.Parent:Play()
	wait (1) -- 1 should be replaced with the duration of the music, or it will repeat. The duration can be found in the audio's explorer thingy if you play it.
    elseif v == false then
        script.Parent:Stop()
    end
end)