diff --git a/README.md b/README.md
index a1e7670..dd4fa1c 100644
--- a/README.md
+++ b/README.md
@@ -71,8 +71,8 @@ the default one instead.
 
 ### Presets and filters:
 
-Presets are a nice way to make specialized blacksmiths by specifying categories of materials, instead of manually
-listing every material manually. They can only be used for the `reforgeAbleItems` option.
+**Presets are a nice way to make specialized blacksmiths by specifying categories of materials, instead of manually
+listing every material manually. They can only be used for the `reforgeAbleItems` option.**
 
 Note: All of these can be used when specifying reforge-able items, such as
 "preset:weapon-smith:bow,preset:armor_smith:gold,PRESET:TOOL_SMITH,shield"
diff --git a/src/main/java/net/knarcraft/blacksmith/config/NPCSettings.java b/src/main/java/net/knarcraft/blacksmith/config/NPCSettings.java
index 6cb7c58..61d13b4 100644
--- a/src/main/java/net/knarcraft/blacksmith/config/NPCSettings.java
+++ b/src/main/java/net/knarcraft/blacksmith/config/NPCSettings.java
@@ -410,14 +410,17 @@ public class NPCSettings {
 
         //Parse every material, and add to reforgeAble items
         for (String item : newReforgeAbleItems.split(",")) {
+            //Ignore ,,
             if (InputParsingHelper.isEmpty(item)) {
                 continue;
             }
+
             boolean blacklist = false;
             if (item.startsWith("-")) {
                 blacklist = true;
                 item = item.substring(1);
             }
+
             Material material = InputParsingHelper.matchMaterial(item);
             if (material != null && BlacksmithTrait.isRepairable(new ItemStack(material, 1))) {
                 if (!blacklist) {
@@ -432,9 +435,7 @@ public class NPCSettings {
         }
 
         //Remove any blacklisted materials at the end to make sure order of arguments won't matter
-        for (Material material : blacklisted) {
-            reforgeAbleItems.remove(material);
-        }
+        this.reforgeAbleItems.removeAll(blacklisted);
     }
 
 }
\ No newline at end of file
diff --git a/src/main/java/net/knarcraft/blacksmith/config/SmithPreset.java b/src/main/java/net/knarcraft/blacksmith/config/SmithPreset.java
index 75e2075..fb6b09e 100644
--- a/src/main/java/net/knarcraft/blacksmith/config/SmithPreset.java
+++ b/src/main/java/net/knarcraft/blacksmith/config/SmithPreset.java
@@ -88,16 +88,21 @@ public enum SmithPreset {
      */
     public static String replacePreset(String possiblePreset) {
         boolean negated = false;
-        if (possiblePreset.startsWith("-")) {
-            negated = true;
-            possiblePreset = possiblePreset.substring(1);
-        }
 
         String upperCasedPreset = possiblePreset.replace('-', '_').toUpperCase();
-        if (!upperCasedPreset.startsWith("PRESET:")) {
+        if (possiblePreset.startsWith("-")) {
+            negated = true;
+        }
+
+        if ((negated && !upperCasedPreset.startsWith("_PRESET:")) && !upperCasedPreset.startsWith("PRESET:")) {
             return possiblePreset;
         }
 
+        //Strip the "-" here to prevent stripping for material names
+        if (negated) {
+            upperCasedPreset = upperCasedPreset.substring(1);
+        }
+
         //Parse the input
         SmithPresetFilter filter = null;
         SmithPreset preset;