CFrame random movements?

For an example of what I'm talking about, please look at that link.

So when I launch my game, it waits 10 seconds, and when it is meant to rotate (which it does), the position of the part goes mental.

My code

script.Parent.Parent.Status.Changed:connect(function()
    if script.Parent.Parent.Status.Value == "Up" then
        for i = 360, 1 do
            script.Parent.Rotation = Vector3.new(0, i, 90)
            wait()
        end
    elseif script.Parent.Parent.Status.Value == "Down" then
        for i = 1, 360 do
            script.Parent.Rotation = Vector3.new(0, i, 90)
            wait()
        end
    end
end)

while wait() do
    script.Parent.CFrame = script.Parent.Parent.WheelRPos.CFrame
end