Why does my door do some kind of flip when it opens?

Basically, I have this script in a double door. These doors are supposed to slide directly out. (left and right) and one of them does some kind of weird flip the first time it moves.

local TweenService = game:GetService("TweenService")
local door1 = script.Parent:WaitForChild("Door1")
local door2 = script.Parent:WaitForChild("Door2")
local tweeningInformation = TweenInfo.new(
 0.5, 
 Enum.EasingStyle.Linear,
 Enum.EasingDirection.Out,
 0,
 false,
 0
)
local door1Open = {CFrame = CFrame.new(-2.549, 3.24, -99.755)}
local door2Open = {CFrame = CFrame.new(-12.269, 3.24, -99.755)}
local door1Close = {CFrame = CFrame.new(-5.688, 3.24, -99.755)}
local door2Close = {CFrame = CFrame.new(-9.165, 3.24, -99.755)}
local tween1open = TweenService:Create(door1,tweeningInformation,door1Open)
local tween1close = TweenService:Create(door1,tweeningInformation,door1Close)
local tween2open = TweenService:Create(door2,tweeningInformation,door2Open)
local tween2close = TweenService:Create(door2,tweeningInformation,door2Close)

script.Parent.KeycardReader1.Touched:Connect(function(hit)
 tween1open:Play()
 tween2open:Play()
 wait(2)
 tween1close:Play()
 tween2close:Play()
end)
script.Parent.KeycardReader2.Touched:Connect(function(hit)
 tween1open:Play()
 tween2open:Play()
 wait(2)
 tween1close:Play()
 tween2close:Play()
end)

Here's a link to a video of what it does.