diff --git a/code/modules/crafting/handmade_items.dm b/code/modules/crafting/handmade_items.dm
index 1135a26cc8b..a04fc7eb13f 100644
--- a/code/modules/crafting/handmade_items.dm
+++ b/code/modules/crafting/handmade_items.dm
@@ -12,6 +12,9 @@
 	if((. = ..()))
 		update_icon()
 
+/obj/item/chems/glass/handmade/get_mould_difficulty()
+	return SKILL_NONE
+
 /obj/item/chems/glass/handmade/teapot
 	name = "teapot"
 	desc = "A handmade, slightly lumpy teapot."
diff --git a/code/modules/detectivework/evidence/_evidence_type.dm b/code/modules/detectivework/evidence/_evidence_type.dm
index 631f8e4c148..3606e7c553f 100644
--- a/code/modules/detectivework/evidence/_evidence_type.dm
+++ b/code/modules/detectivework/evidence/_evidence_type.dm
@@ -4,17 +4,18 @@
 	var/max_entries = 10  //will hold that many entries, removing oldest when overflown
 	var/list/data
 	var/remove_on_transfer //if it should be removed when picked up by forensic samplers
-	var/spot_skill = SKILL_EXPERT	// at what Forensics skill level someone can see it on examine. Set to null, can never see it 
+	var/spot_skill = SKILL_EXPERT	// at what Forensics skill level someone can see it on examine. Set to null, can never see it
 
 //subtypes can implement any merging if needed before calling parent
 /datum/forensics/proc/add_data(newdata)
 	if(!newdata)
 		return
-	if(unique && (newdata in data))
-		return
-	LAZYADD(data, newdata)
+	if(unique)
+		LAZYDISTINCTADD(data, newdata)
+	else
+		LAZYADD(data, newdata)
 	if(length(data) > max_entries)
-		data.Cut(1,2)
+		data.len = max_entries
 
 /datum/forensics/proc/add_from_atom(atom/A)
 
@@ -28,7 +29,7 @@
 	for(var/D in data)
 		. += "<li>[D]"
 	return jointext(., "<br>")
-	
+
 /datum/forensics/proc/can_spot(mob/detective, atom/location)
 	. = FALSE
 	if(spot_skill && detective.skill_check(SKILL_FORENSICS,spot_skill))
diff --git a/code/modules/detectivework/evidence/fingerprints.dm b/code/modules/detectivework/evidence/fingerprints.dm
index 290bccd19c4..0fad8bbb784 100644
--- a/code/modules/detectivework/evidence/fingerprints.dm
+++ b/code/modules/detectivework/evidence/fingerprints.dm
@@ -17,6 +17,7 @@
 			continue
 		for(var/datum/fingerprint/F in data)
 			if(F.merge(newprint))
+				newdata -= newprint
 				continue
 	..()