diff --git a/src/main/java/appeng/helpers/DualityInterface.java b/src/main/java/appeng/helpers/DualityInterface.java
index 90a359102..e019996ff 100644
--- a/src/main/java/appeng/helpers/DualityInterface.java
+++ b/src/main/java/appeng/helpers/DualityInterface.java
@@ -561,6 +561,7 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 		{
 			try
 			{
+				this.gridProxy.getGrid().postEvent( new MENetworkCraftingPatternChange( this, this.gridProxy.getNode() ) );
 				this.gridProxy.getTick().wakeDevice( this.gridProxy.getNode() );
 			}
 			catch( final GridAccessException e )
@@ -808,17 +809,18 @@ public class DualityInterface implements IGridTickable, IStorageMonitorable, IIn
 			return;
 		}
 
+		final InventoryAdaptor ad = InventoryAdaptor.getAdaptor( te, s.getOpposite() );
+
 		final Iterator<ItemStack> i = this.waitingToSendFacing.get( s ).iterator();
 		while ( i.hasNext() )
 		{
 			ItemStack whatToSend = i.next();
-			final InventoryAdaptor ad = InventoryAdaptor.getAdaptor( te, s.getOpposite() );
 			if( ad != null )
 			{
 				final ItemStack result = ad.addItems( whatToSend );
 				if( !result.isEmpty() )
 				{
-					whatToSend.setCount( whatToSend.getCount() - ( whatToSend.getCount() - result.getCount() ) );
+					whatToSend.setCount( result.getCount() );
 				}
 				else
 				{
diff --git a/src/main/java/appeng/me/cache/CraftingGridCache.java b/src/main/java/appeng/me/cache/CraftingGridCache.java
index 8b55c9825..240d0851a 100644
--- a/src/main/java/appeng/me/cache/CraftingGridCache.java
+++ b/src/main/java/appeng/me/cache/CraftingGridCache.java
@@ -115,7 +115,7 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 	private IEnergyGrid energyGrid;
 	int i;
 	private boolean updateList = false;
-	private boolean updatePatterns = true;
+	private boolean updatePatterns = false;
 
 	public CraftingGridCache( final IGrid grid )
 	{
@@ -415,14 +415,20 @@ public class CraftingGridCache implements ICraftingGrid, ICraftingProviderHelper
 		if( !updatePatterns )
 		{
 			List<IAEItemStack> newCraftables = new ArrayList<>();
-			for( IAEItemStack stack : api.getOutputs() )
+
+			ObjectSet<ICraftingPatternDetails> b = new ObjectRBTreeSet<>( COMPARATOR );
+			ImmutableList<ICraftingPatternDetails> a = this.craftableItems.get( api.getCondensedOutputs()[0] );
+			if( a != null )
 			{
-				ImmutableList<ICraftingPatternDetails> a = this.craftableItems.get( stack );
-				if( a == null || a.get( 0 ).getPriority() < api.getPriority() )
-				{
-					this.craftableItems.put( stack, ImmutableList.of( api ) );
-					newCraftables.add( stack.copy().reset().setCraftable( true ) );
-				}
+				b.addAll( this.craftableItems.get( api.getOutputs()[0] ) );
+			}
+			b.add( api );
+
+			for( IAEItemStack stack : api.getCondensedOutputs() )
+			{
+				IAEItemStack i = stack.copy().reset().setCraftable( true );
+				this.craftableItems.put( i, ImmutableList.copyOf( b ) );
+				newCraftables.add( i );
 			}
 			this.storageGrid.postCraftablesChanges( AEApi.instance().storage().getStorageChannel( IItemStorageChannel.class ), newCraftables, new BaseActionSource() );
 		}
diff --git a/src/main/java/appeng/util/inv/AdaptorItemHandler.java b/src/main/java/appeng/util/inv/AdaptorItemHandler.java
index 65b6843ae..5828dc0be 100644
--- a/src/main/java/appeng/util/inv/AdaptorItemHandler.java
+++ b/src/main/java/appeng/util/inv/AdaptorItemHandler.java
@@ -232,6 +232,10 @@ public class AdaptorItemHandler extends InventoryAdaptor
 
 		for( int slot = 0; slot < this.itemHandler.getSlots(); slot++ )
 		{
+			if( !simulate )
+			{
+				itemsToAdd = itemsToAdd.copy();
+			}
 			itemsToAdd = this.itemHandler.insertItem( slot, itemsToAdd, simulate );
 
 			if( itemsToAdd.isEmpty() )
diff --git a/src/main/java/appeng/util/inv/AdaptorItemRepository.java b/src/main/java/appeng/util/inv/AdaptorItemRepository.java
index 86f5db69e..de7e93b4b 100644
--- a/src/main/java/appeng/util/inv/AdaptorItemRepository.java
+++ b/src/main/java/appeng/util/inv/AdaptorItemRepository.java
@@ -163,23 +163,26 @@ public class AdaptorItemRepository extends InventoryAdaptor
 		return this.addItems( toBeAdded, false );
 	}
 
-	protected ItemStack addItems( final ItemStack itemsToAdd, final boolean simulate )
+	protected ItemStack addItems( ItemStack itemsToAdd, final boolean simulate )
 	{
 		if( itemsToAdd.isEmpty() )
 		{
 			return ItemStack.EMPTY;
 		}
 
-		ItemStack left = itemsToAdd.copy();
+		if( !simulate )
+		{
+			itemsToAdd = itemsToAdd.copy();
+		}
 
-		left = this.itemRepository.insertItem( left, simulate );
+		itemsToAdd = this.itemRepository.insertItem( itemsToAdd, simulate );
 
-		if( left.isEmpty() )
+		if( itemsToAdd.isEmpty() )
 		{
 			return ItemStack.EMPTY;
 		}
 
-		return left;
+		return itemsToAdd;
 	}
 
 	@Override
diff --git a/src/main/java/appeng/util/inv/BlockingItemHandler.java b/src/main/java/appeng/util/inv/BlockingItemHandler.java
index 60958e3bd..ac21c4df5 100644
--- a/src/main/java/appeng/util/inv/BlockingItemHandler.java
+++ b/src/main/java/appeng/util/inv/BlockingItemHandler.java
@@ -37,11 +37,10 @@ public class BlockingItemHandler extends BlockingInventoryAdaptor
 		for( int slot = 0; slot < slots; slot++ )
 		{
 			ItemStack is = this.itemHandler.getStackInSlot( slot );
-			if( is.isEmpty() || !isBlockableItem( is ) )
+			if( !is.isEmpty() && isBlockableItem( is ) )
 			{
-				continue;
+				return true;
 			}
-			return true;
 		}
 		return false;
 	}