thanks tmt i fixeded the bug

code/game/objects/structures/crateshelf.dm

@@ -17,21 +17,22 @@
 /obj/structure/crate_shelf/Initialize()
 	. = ..()
 	shelf_contents = new/list(capacity)
-	var/stack_layer = BELOW_OBJ_LAYER
+	var/stack_layer
 	var/stack_offset
-	for(var/i=1,i<capacity,i++)
-		stack_layer += (0.02 * i) - 0.01
+	for(var/i in 1 to (capacity - 1))
+		stack_layer  = BELOW_OBJ_LAYER + (0.02 * i) - 0.01
 		stack_offset = i * 10
 		overlays += image(icon = 'icons/obj/objects.dmi', icon_state = "shelf_stack", layer = stack_layer, pixel_y = stack_offset)
 	return
 
 /obj/structure/crate_shelf/MouseDrop_T(obj/structure/closet/crate/crate, mob/user)
-	if(!src.Adjacent(user, mover = crate))
+	if(!src.Adjacent(crate))
 		return
 	if(!isliving(user))
 		return
-	if(!crate.close())
-		return
+	if(crate.opened)
+		if(!crate.close())
+			return
 	var/next_free = shelf_contents.Find(null)
 	if(next_free)
 		if(do_after(user, useDelay, target = crate))