Camera view button not working when more than 1 train is spawned?

Should be a final question for a while. I have a gui that can change the players camera while driving. However, when you spawn more of the train, it messes up the camera. It's alright if its one train, but if you spawn more of the same then it gets messy.

Here is the camera script:

local CameraViewButton = script.Parent
local Camera = game.Workspace.CurrentCamera
local CameraView = 1
local TrainSeat = script.Parent.Parent.Parent.Parent.Parent.C153.MachinistSeat
local Seat = game.Players.LocalPlayer.Character.Humanoid.SeatPart

function ChangeCamera(View)
    if View == 1 then
        game:GetService("RunService"):UnbindFromRenderStep("UpdateCamera")
        Camera.CameraType = "Custom"
        Camera.CameraSubject = TrainSeat
    elseif View == 2 then
        Camera.CameraType = "Watch"
        Camera.CameraSubject = TrainSeat.Parent
    elseif View == 3 then
        Camera.CameraType = "Scriptable"
        game:GetService("RunService"):BindToRenderStep("UpdateCamera", Enum.RenderPriority.Camera.Value - 1, function()
            Camera.CoordinateFrame = CFrame.new(Seat.Parent.Poles.Position) * CFrame.Angles(math.rad(0), math.rad(Seat.Parent.Poles.Orientation.Y + 30), math.rad(0))
        end)
    end
end

function ChangeCameraView()
    CameraView = CameraView + 1
    if CameraView == 4 then
        CameraView = 1
    end
    ChangeCamera(CameraView)
end

CameraViewButton.MouseButton1Click:connect(ChangeCameraView)

Regen:

local Engine = script.Parent.Parent["C153"]
local CloneTrain = Engine:clone()
Button = script.Parent.Parent.WCSpawn

function spawnTrain()
    if Button.BrickColor == BrickColor.new(104) then
    local Model = CloneTrain:Clone()--Clones the backup so the script doesn't break
    Model.Parent = game.Workspace --Puts the model into the game
    Model:MakeJoints() --Makes it so the model doesn't fall apart.
    Model.Bogies.SD_Bogie2:MakeJoints()
    Model.Bogies.SD_Bogie:MakeJoints()
    Button.BrickColor = BrickColor.new(26)
    wait(45)
    Button.BrickColor = BrickColor.new(104)
    end
end


script.Parent.ClickDetector.MouseClick:connect(spawnTrain)

Help appreciated.

Thanks for reading.