resize tool resizes in an odd way?

I have a resize tool:

local tool = script.Parent
local plr = game.Players.LocalPlayer
local mouse = plr:GetMouse()
enabled = true
local selectionBox
local selectionLasso
local handles
local previousDistance
local originalpart
local buttonupconnection
local tempart
local increment = 0.5
local originalcf, originalsize




local AxisSizeMultipliers = {
	[Enum.NormalId.Top] = Vector3.new(0, 1, 0);
	[Enum.NormalId.Bottom] = Vector3.new(0, 1, 0);
	[Enum.NormalId.Front] = Vector3.new(0, 0, 1);
	[Enum.NormalId.Back] = Vector3.new(0, 0, 1);
	[Enum.NormalId.Left] = Vector3.new(1, 0, 0);
	[Enum.NormalId.Right] = Vector3.new(1, 0, 0);
}


local AxisPositioningMultipliers = {
	[Enum.NormalId.Top] = Vector3.new(0, 1, 0);
	[Enum.NormalId.Bottom] = Vector3.new(0, -1, 0);
	[Enum.NormalId.Front] = Vector3.new(0, 0, -1);
	[Enum.NormalId.Back] = Vector3.new(0, 0, 1);
	[Enum.NormalId.Left] = Vector3.new(-1, 0, 0);
	[Enum.NormalId.Right] = Vector3.new(1, 0, 0);
}




function onHandlesDown(normal)
	originalcf = handles.Adornee.CFrame
	originalsize = handles.Adornee.Size
	previousDistance = 0
end



function onHandlesDrag(normal, distance)
	if handles.Adornee then
		distance = distance - (distance%increment)
		handles.Adornee.Size = originalsize + AxisSizeMultipliers[normal] * distance
		handles.Adornee.CFrame = originalcf + (AxisPositioningMultipliers[normal] * distance) / 2
			
			if handles.Adornee then
				previousDistance = distance
				--send changes to server
				buttonupconnection = mouse.Button1Up:connect(function()onButton1Up(mouse,handles.Adornee)end)
	--
		end
	end
end




function onButton1Up(mouse,part)
	if part and script.Parent.Parent == plr.Character then
	local size = part.Size
	local cfr = part.CFrame
	script.Parent.PartChange:FireServer(originalpart,size,cfr)
	end
end




function onButton1Down(mouse)
	local findpart = game.ReplicatedStorage.BuildingParts:FindFirstChild(mouse.Target.Name)
	if tempart then
		tempart:Destroy()
		end
	if mouse.Target == nil or mouse.Target.Locked or not findpart then
		print("nil")
		selectionBox.Adornee = nil
		selectionLasso.Part = nil
		handles.Adornee = nil
	else
		print("not nil")
		originalpart = mouse.Target
		tempart = findpart:Clone()
		tempart.CanCollide = false
		tempart.Anchored = true
		tempart.Transparency = 0.6
		tempart.Size = originalpart.Size
		tempart.Parent = game.Workspace
		tempart.CFrame = originalpart.CFrame
		tempart.BrickColor = BrickColor.new("Lime green")
		selectionBox.Adornee = tempart
		selectionLasso.Part = tempart
		handles.Adornee = tempart
		handles.Faces = tempart.ResizeableFaces
	end
end




function onEquippedLocal(mouse)
	mouse.Button1Down:connect(function() onButton1Down(mouse) end)

	local character = script.Parent.Parent
	local player = game.Players:GetPlayerFromCharacter(character)
	
	selectionBox = Instance.new("SelectionBox")
	selectionBox.Color = BrickColor.Blue()
	selectionBox.Adornee = nil
	selectionBox.Parent = player.PlayerGui

	selectionLasso = Instance.new("SelectionPartLasso")
	selectionLasso.Name = "Model Delete Lasso"
	selectionLasso.Humanoid = character.Humanoid
	selectionLasso.Parent = game.workspace
	selectionLasso.Part = nil
	selectionLasso.Visible = true
	selectionLasso.archivable = false
	selectionLasso.Color = BrickColor.Red()

	handles = Instance.new("Handles")
	handles.Color = BrickColor.Blue()
	handles.Adornee = nil
	handles.MouseDrag:connect(onHandlesDrag)
	handles.MouseButton1Down:connect(onHandlesDown)
	handles.Parent = player.PlayerGui
end

function onUnequippedLocal()
	selectionBox:Destroy()
	selectionLasso:Destroy()
	handles:Destroy()
	if handles.Adornee then
		handles.Adornee:Destroy()
	end
	if buttonupconnection then
	buttonupconnection:Disconnect()
	end
end


tool.Equipped:connect(onEquippedLocal)
tool.Unequipped:connect(onUnequippedLocal)

but I noticed something odd, when I resize a tool that has not been recently rotated, it resizes in the direction of the handle thats being dragged as expected, however the part was rotated, the part resizes in the wrong direction, why is this?