default dir for doors is SOUTH/2

multitile airlocks have their own note/photo overlays
airlock overlay animations use correct looping setting

code/game/machinery/doors/airlock_types.dm

@@ -481,9 +481,11 @@
 //Terribly sorry for the code doubling, but things go derpy otherwise.
 /obj/machinery/door/airlock/multi_tile
 	name = "large airlock"
+	dir = EAST
 	width = 2
 	icon = 'icons/obj/doors/airlocks/glass_large/glass_large.dmi'
 	overlays_file = 'icons/obj/doors/airlocks/glass_large/overlays.dmi'
+	note_overlay_file = 'icons/obj/doors/airlocks/glass_large/overlays.dmi'
 	assemblytype = "obj/structure/door_assembly/multi_tile"
 
 /obj/machinery/door/airlock/multi_tile/narsie_act()

code/game/machinery/doors/door.dm

@@ -26,7 +26,6 @@
 	var/block_air_zones = 1 //If set, air zones cannot merge across the door even when it is opened.
 
 	//Multi-tile doors
-	dir = EAST
 	var/width = 1
 
 /obj/machinery/door/New()

code/game/machinery/doors/shutters.dm

@@ -3,6 +3,7 @@
 	desc = "Heavy duty metal shutters that opens mechanically."
 	icon = 'icons/obj/doors/rapid_pdoor.dmi'
 	icon_state = "shutter1"
+	dir = EAST
 
 /obj/machinery/door/poddoor/shutters/New()
 	..()

code/game/machinery/doors/windowdoor.dm

@@ -6,6 +6,7 @@
 	visible = 0.0
 	flags = ON_BORDER
 	opacity = 0
+	dir = EAST
 	var/obj/item/weapon/airlock_electronics/electronics = null
 	var/base_state = "left"
 	var/health = 150.0 //If you change this, consider changing ../door/window/brigdoor/ health at the bottom of this .dm file