From 6c29da94f30a98aff391c517d0698b8ced2675c7 Mon Sep 17 00:00:00 2001
From: isokissa3 <koti94@windowslive.com>
Date: Wed, 11 Mar 2015 11:36:51 +0200
Subject: [PATCH 1/2] Fixed duplication Bug #2419

---
 src/main/java/com/gmail/nossr50/listeners/BlockListener.java | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/gmail/nossr50/listeners/BlockListener.java b/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
index 72b4676ac..011bef5e0 100644
--- a/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
+++ b/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
@@ -94,9 +94,9 @@ public class BlockListener implements Listener {
      */
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onBlockPistonRetract(BlockPistonRetractEvent event) {
-        if (!EventUtils.shouldProcessEvent(event.getBlock(), false)) {
+        /*if (!EventUtils.shouldProcessEvent(event.getBlock(), false)) {
             return;
-        }
+        }*/
 
         if (!event.isSticky()) {
             return;

From f76771f0a8a4a4893d6c7eeff183579c576f703d Mon Sep 17 00:00:00 2001
From: isokissa3 <koti94@windowslive.com>
Date: Wed, 11 Mar 2015 14:31:56 +0200
Subject: [PATCH 2/2] Fixed duplication bug #2419 (Correct fix)

---
 .../nossr50/listeners/BlockListener.java      | 24 +++++++++++++------
 .../runnables/StickyPistonTrackerTask.java    |  7 +++---
 2 files changed, 21 insertions(+), 10 deletions(-)

diff --git a/src/main/java/com/gmail/nossr50/listeners/BlockListener.java b/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
index 011bef5e0..2c142d1b5 100644
--- a/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
+++ b/src/main/java/com/gmail/nossr50/listeners/BlockListener.java
@@ -2,6 +2,7 @@ package com.gmail.nossr50.listeners;
 
 import java.util.List;
 
+import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
 import org.bukkit.Location;
 import org.bukkit.Material;
@@ -94,18 +95,27 @@ public class BlockListener implements Listener {
      */
     @EventHandler(priority = EventPriority.MONITOR, ignoreCancelled = true)
     public void onBlockPistonRetract(BlockPistonRetractEvent event) {
-        /*if (!EventUtils.shouldProcessEvent(event.getBlock(), false)) {
-            return;
-        }*/
-
-        if (!event.isSticky()) {
+        if (!EventUtils.shouldProcessEvent(event.getBlock(), false)) {
             return;
         }
 
-        Block movedBlock = event.getRetractLocation().getBlock();
+        // Don't even work, return ALLWAYS false xD
+        /*if (!event.isSticky()){
+        	return;
+        }*/      
+        
+        // Sticky piston return PISTON_MOVING_PIECE and normal piston PISTON_BASE, so mess stuff
+        if (event.getBlock().getType() != Material.PISTON_MOVING_PIECE) {
+            return;
+        }
+
+        // event.getRetractLocation() return wrong side and too far away
+        // Get opposite direction so we get correct block, so mess stuff
+        Block movedBlock = event.getBlock().getRelative(event.getDirection().getOppositeFace());
 
         // Needed only because under some circumstances Minecraft doesn't move the block
-        new StickyPistonTrackerTask(event.getDirection(), event.getBlock(), movedBlock).runTaskLater(plugin, 2);
+        // Opposite side here too
+        new StickyPistonTrackerTask(event.getDirection().getOppositeFace(), event.getBlock(), movedBlock).runTaskLater(plugin, 2);
     }
 
     /**
diff --git a/src/main/java/com/gmail/nossr50/runnables/StickyPistonTrackerTask.java b/src/main/java/com/gmail/nossr50/runnables/StickyPistonTrackerTask.java
index 148ce83b2..bad701619 100644
--- a/src/main/java/com/gmail/nossr50/runnables/StickyPistonTrackerTask.java
+++ b/src/main/java/com/gmail/nossr50/runnables/StickyPistonTrackerTask.java
@@ -1,5 +1,6 @@
 package com.gmail.nossr50.runnables;
 
+import org.bukkit.Bukkit;
 import org.bukkit.block.Block;
 import org.bukkit.block.BlockFace;
 import org.bukkit.scheduler.BukkitRunnable;
@@ -20,7 +21,7 @@ public class StickyPistonTrackerTask extends BukkitRunnable {
 
     @Override
     public void run() {
-        if (!mcMMO.getPlaceStore().isTrue(movedBlock)) {
+        if (!mcMMO.getPlaceStore().isTrue(movedBlock.getRelative(direction))) {
             return;
         }
 
@@ -30,7 +31,7 @@ public class StickyPistonTrackerTask extends BukkitRunnable {
         }
 
         // The sticky piston actually pulled the block so move the PlaceStore data
-        mcMMO.getPlaceStore().setFalse(movedBlock);
-        mcMMO.getPlaceStore().setTrue(movedBlock.getRelative(direction));
+        mcMMO.getPlaceStore().setFalse(movedBlock.getRelative(direction));
+        mcMMO.getPlaceStore().setTrue(movedBlock);
     }
 }