TFormNormal not working?

TFormNormal is supposed to work in exactly the same way as TFormVector, except the resultant vector is normalized, right? This demo shows TFormNormal returning a completely different vector from TFormVector:

	Graphics3D 640,480,32,2
	SetBuffer BackBuffer()

	WireFrame True

	cam = CreateCamera()
	PositionEntity cam,0,0,-8
	CameraProjMode cam,2
	CameraZoom cam,0.1
	
	; Create source entity of tform.
	source_cone = CreateCone()
	ScaleEntity source_cone,.5,1,.5
	PositionEntity source_cone,3,3,0
	TurnEntity source_cone,0,0,90

	; Create destination entity of tform.
	dest_cone = CreateCone()
	ScaleEntity dest_cone,2,1,2
	PositionEntity dest_cone,-3,-3,0
	TurnEntity dest_cone,0,0,45

	; Create marker blob.
	blob = CreateSphere(16,dest_cone)
	ScaleEntity blob,.2,.2,.2,True
	
	While Not KeyHit(1)

		If KeyDown(2)
			TFormVector(1,1,0, source_cone,dest_cone)
			PositionEntity blob,TFormedX(),TFormedY(),TFormedZ()
		ElseIf KeyDown(3)
			TFormNormal(1,1,0, source_cone,dest_cone)
			PositionEntity blob,TFormedX(),TFormedY(),TFormedZ()
		Else
			PositionEntity blob,0,0,0
		EndIf

		RenderWorld
		
		Text 10,10,"Press 1 to move blob from centre of cone, along the tformed vector"
		Text 10,30,"Press 2 to move blob from centre of cone, along the tformed normal"
	
		Flip True

	Wend

	End