diff --git a/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockGatewayPortal.java b/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockGatewayPortal.java
index dd91cde..4d1ecc2 100644
--- a/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockGatewayPortal.java
+++ b/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockGatewayPortal.java
@@ -117,7 +117,7 @@ public class BlockGatewayPortal extends Block {
             }
         }
         final TileEntity te = world.getTileEntity(slotX, slotY, slotZ);
-        if (te instanceof TileSlot) {
+        if (te instanceof TileSlot && ((TileSlot) te).portalOpen) {
             ((TileSlot) te).destroyPortal();
         }
     }
diff --git a/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockSlot.java b/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockSlot.java
index 8910355..c723341 100644
--- a/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockSlot.java
+++ b/src/main/java/com/kentington/thaumichorizons/common/blocks/BlockSlot.java
@@ -32,6 +32,7 @@ public class BlockSlot extends BlockContainer {
 
     public void breakBlock(final World world, final int x, final int y, final int z, final Block block, final int md) {
         final TileSlot tco = (TileSlot) world.getTileEntity(x, y, z);
+        if (tco == null) return;
         if (tco.portalOpen) {
             tco.destroyPortal();
         }
@@ -59,15 +60,20 @@ public class BlockSlot extends BlockContainer {
                 if (tco.portalOpen) {
                     tco.destroyPortal();
                 }
+                world.markBlockForUpdate(x, y, z);
+                return true;
             } else if (!tco.portalOpen && player.getHeldItem().getItem() instanceof ItemWandCasting) {
                 tco.makePortal(player);
+                world.markBlockForUpdate(x, y, z);
+                return true;
             }
         } else if (theItem != null && theItem.getItem() == ThaumicHorizons.itemKeystone
                 && theItem.stackTagCompound != null) {
                     tco.insertKeystone(theItem.stackTagCompound.getInteger("dimension"));
                     --theItem.stackSize;
+                    world.markBlockForUpdate(x, y, z);
+                    return true;
                 }
-        world.markBlockForUpdate(x, y, z);
         return false;
     }
 
diff --git a/src/main/java/com/kentington/thaumichorizons/common/items/ItemKeystone.java b/src/main/java/com/kentington/thaumichorizons/common/items/ItemKeystone.java
index 83513c3..87bc48e 100644
--- a/src/main/java/com/kentington/thaumichorizons/common/items/ItemKeystone.java
+++ b/src/main/java/com/kentington/thaumichorizons/common/items/ItemKeystone.java
@@ -50,8 +50,11 @@ public class ItemKeystone extends Item {
 
     public void addInformation(final ItemStack par1ItemStack, final EntityPlayer par2EntityPlayer, final List par3List,
             final boolean par4) {
-        if (par1ItemStack.getTagCompound() != null && par1ItemStack.getTagCompound().getInteger("dimension") != 0) {
-            par3List.add(PocketPlaneData.planes.get(par1ItemStack.getTagCompound().getInteger("dimension")).name);
+        if (par1ItemStack.getTagCompound() != null) {
+            final int dim = par1ItemStack.getTagCompound().getInteger("dimension");
+            if (dim >= 0 && dim < PocketPlaneData.planes.size()) {
+                par3List.add(PocketPlaneData.planes.get(dim).name);
+            }
         }
         super.addInformation(par1ItemStack, par2EntityPlayer, par3List, par4);
     }
@@ -71,9 +74,13 @@ public class ItemKeystone extends Item {
             float hitX, float hitY, float hitZ) {
         if (stack.getTagCompound() == null && player.dimension == ThaumicHorizons.dimensionPocketId
                 && !world.isRemote) {
-            if (world.getTileEntity(x, y, z) instanceof TileVortex)
-                (stack.stackTagCompound = new NBTTagCompound()).setInteger("dimension", (z + 128) / 256);
-            return true;
+            final net.minecraft.tileentity.TileEntity te = world.getTileEntity(x, y, z);
+            if (te instanceof TileVortex) {
+                (stack.stackTagCompound = new NBTTagCompound()).setInteger("dimension", ((TileVortex) te).dimensionID);
+                player.inventory.markDirty();
+                return true;
+            }
+            return false;
         }
         return super.onItemUseFirst(stack, player, world, x, y, z, side, hitX, hitY, hitZ);
     }
diff --git a/src/main/java/com/kentington/thaumichorizons/common/lib/PocketPlaneData.java b/src/main/java/com/kentington/thaumichorizons/common/lib/PocketPlaneData.java
index 111f581..2ee162c 100644
--- a/src/main/java/com/kentington/thaumichorizons/common/lib/PocketPlaneData.java
+++ b/src/main/java/com/kentington/thaumichorizons/common/lib/PocketPlaneData.java
@@ -128,7 +128,7 @@ public class PocketPlaneData {
             data.portalD = new int[4];
             PocketPlaneData.planes.add(data);
             PocketPlaneData.positions.put(pocketPlaneMAXID, Vec3.createVectorHelper(vortexX, vortexY, vortexZ));
-            world.getChunkFromBlockCoords(vortexX, vortexZ).isModified = true;
+            world.getChunkFromBlockCoords(xCenter, zCenter).isModified = true;
             creatures = 0;
             ++pocketPlaneMAXID;
         }
diff --git a/src/main/java/com/kentington/thaumichorizons/common/tiles/TileVortex.java b/src/main/java/com/kentington/thaumichorizons/common/tiles/TileVortex.java
index c200c46..81f7464 100644
--- a/src/main/java/com/kentington/thaumichorizons/common/tiles/TileVortex.java
+++ b/src/main/java/com/kentington/thaumichorizons/common/tiles/TileVortex.java
@@ -175,7 +175,7 @@ public class TileVortex extends TileThaumcraft implements IWandable, IAspectCont
                                 if (player.timeUntilPortal > 0) {
                                     player.timeUntilPortal = 10;
                                 } else if (player.dimension != ThaumicHorizons.dimensionPocketId) {
-                                    player.timeUntilPortal = 10;
+                                    player.timeUntilPortal = 200;
                                     player.mcServer.getConfigurationManager().transferPlayerToDimension(
                                             player,
                                             ThaumicHorizons.dimensionPocketId,
@@ -183,7 +183,7 @@ public class TileVortex extends TileThaumcraft implements IWandable, IAspectCont
                                                     mServer.worldServerForDimension(ThaumicHorizons.dimensionPocketId),
                                                     this.dimensionID));
                                 } else {
-                                    player.timeUntilPortal = 10;
+                                    player.timeUntilPortal = 200;
                                     player.mcServer.getConfigurationManager().transferPlayerToDimension(
                                             player,
                                             this.returnID,
@@ -321,7 +321,7 @@ public class TileVortex extends TileThaumcraft implements IWandable, IAspectCont
                             this.xCoord,
                             this.yCoord,
                             this.zCoord,
-                            this.returnID))).run();
+                            this.returnID))).start();
         }
         this.markDirty();
     }