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