Fix paper carbon invisibility and duplication (#57172)

code/modules/paperwork/carbonpaper.dm

@@ -7,21 +7,20 @@
 	var/iscopy = FALSE
 
 /obj/item/paper/carbon/update_icon_state()
-	if(info)
-		icon_state = "[icon_state]_words"
-		return ..()
 	if(iscopy)
 		icon_state = "cpaper"
-		return ..()
-	if(copied)
+	else if(copied)
 		icon_state = "paper"
-		return ..()
-
-	icon_state = "paper_stack"
+	else
+		icon_state = "paper_stack"
+	if(info)
+		icon_state = "[icon_state]_words"
 	return ..()
 
 /obj/item/paper/carbon/proc/removecopy(mob/living/user)
-	if(!copied)
+	if(copied || iscopy)
+		to_chat(user, "<span class='notice'>There are no more carbon copies attached to this paper!</span>")
+	else
 		var/obj/item/paper/carbon/C = src
 		var/copycontents = C.info
 		var/obj/item/paper/carbon/Copy = new /obj/item/paper/carbon(user.loc)
@@ -38,8 +37,6 @@
 		Copy.update_icon_state()
 		C.update_icon_state()
 		user.put_in_hands(Copy)
-	else
-		to_chat(user, "<span class='notice'>There are no more carbon copies attached to this paper!</span>")
 
 /obj/item/paper/carbon/attack_hand(mob/living/user, list/modifiers)
 	if(loc == user && user.is_holding(src))

code/modules/paperwork/paperplane.dm

@@ -30,6 +30,8 @@
 		newPaper.forceMove(src)
 	else
 		internalPaper = new(src)
+	if(internalPaper.icon_state == "cpaper" || internalPaper.icon_state == "cpaper_words")
+		icon_state = "paperplane_carbon" // It's the purple carbon copy. Use the purple paper plane
 	update_appearance()
 
 /obj/item/paperplane/Exited(atom/movable/AM, atom/newLoc)