diff --git a/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardBlockListener.java b/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardBlockListener.java
index 6dd9d2d0..08fd3b31 100644
--- a/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardBlockListener.java
+++ b/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardBlockListener.java
@@ -266,8 +266,9 @@ public void onBlockFromTo(BlockFromToEvent event) {
         }
 
         if (wcfg.disableObsidianGenerators && (isAir || isLava)
-                && blockTo.getTypeId() == 55) {
-            blockTo.setTypeId(0);
+                && (blockTo.getTypeId() == BlockID.REDSTONE_WIRE
+                    || blockTo.getTypeId() == BlockID.TRIPWIRE)) {
+            blockTo.setTypeId(BlockID.AIR);
             return;
         }
     }
diff --git a/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardPlayerListener.java b/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardPlayerListener.java
index 10688feb..f53c753c 100644
--- a/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardPlayerListener.java
+++ b/src/main/java/com/sk89q/worldguard/bukkit/WorldGuardPlayerListener.java
@@ -1482,6 +1482,9 @@ public void onPlayerCommandPreprocess(PlayerCommandPreprocessEvent event) {
                                     continue;
                                 }
                             }
+                        } else {
+                            // found non-matching part, stop checking this command
+                            continue blocked;
                         }
                     }
                 }