diff --git a/src/main/java/appeng/block/storage/BlockIOPort.java b/src/main/java/appeng/block/storage/BlockIOPort.java
index 69f10ef2d..28b9865cc 100644
--- a/src/main/java/appeng/block/storage/BlockIOPort.java
+++ b/src/main/java/appeng/block/storage/BlockIOPort.java
@@ -19,6 +19,7 @@
 package appeng.block.storage;
 
 
+import appeng.api.config.Upgrades;
 import appeng.api.util.AEPartLocation;
 import appeng.block.AEBaseTileBlock;
 import appeng.core.sync.GuiBridge;
@@ -67,7 +68,9 @@ public class BlockIOPort extends AEBaseTileBlock {
     public void neighborChanged(IBlockState state, World world, BlockPos pos, Block blockIn, BlockPos fromPos) {
         final TileIOPort te = this.getTileEntity(world, pos);
         if (te != null) {
-            te.updateRedstoneState();
+            if (te.getInstalledUpgrades(Upgrades.REDSTONE) != 0) {
+                te.updateRedstoneState();
+            }
         }
     }
 
diff --git a/src/main/java/appeng/core/AEConfig.java b/src/main/java/appeng/core/AEConfig.java
index 7909e3cf5..b285c6bbe 100644
--- a/src/main/java/appeng/core/AEConfig.java
+++ b/src/main/java/appeng/core/AEConfig.java
@@ -268,7 +268,7 @@ public final class AEConfig extends Configuration implements IConfigurableObject
 
             this.craftByStacks[btnNum] = Math.abs(cmb.getInt(this.craftByStacks[btnNum]));
             this.priorityByStacks[btnNum] = Math.abs(pmb.getInt(this.priorityByStacks[btnNum]));
-            this.levelByStacks[btnNum] = Math.abs(pmb.getInt(this.levelByStacks[btnNum]));
+            this.levelByStacks[btnNum] = Math.abs(lmb.getInt(this.levelByStacks[btnNum]));
 
             cmb.setComment("Controls buttons on Crafting Screen : Capped at " + buttonCap);
             pmb.setComment("Controls buttons on Priority Screen : Capped at " + buttonCap);
diff --git a/src/main/java/appeng/tile/storage/TileIOPort.java b/src/main/java/appeng/tile/storage/TileIOPort.java
index 586af1b93..8b9f1a2be 100644
--- a/src/main/java/appeng/tile/storage/TileIOPort.java
+++ b/src/main/java/appeng/tile/storage/TileIOPort.java
@@ -183,6 +183,11 @@ public class TileIOPort extends AENetworkInvTile implements IUpgradeableHost, IC
         if (this.lastRedstoneState != currentState) {
             this.lastRedstoneState = currentState;
             this.updateTask();
+            if (currentState == YesNo.YES) {
+                if (this.manager.getSetting(Settings.REDSTONE_CONTROLLED) == RedstoneMode.SIGNAL_PULSE) {
+                    this.doWork();
+                }
+            }
         }
     }
 
@@ -198,12 +203,21 @@ public class TileIOPort extends AENetworkInvTile implements IUpgradeableHost, IC
         if (this.getInstalledUpgrades(Upgrades.REDSTONE) == 0) {
             return true;
         }
-
         final RedstoneMode rs = (RedstoneMode) this.manager.getSetting(Settings.REDSTONE_CONTROLLED);
-        if (rs == RedstoneMode.HIGH_SIGNAL) {
-            return this.getRedstoneState();
+        switch (rs) {
+            case IGNORE:
+                return true;
+
+            case HIGH_SIGNAL:
+                return this.getRedstoneState();
+
+            case LOW_SIGNAL:
+                return !this.getRedstoneState();
+
+            case SIGNAL_PULSE:
+            default:
+                return false;
         }
-        return !this.getRedstoneState();
     }
 
     @Override
@@ -268,7 +282,10 @@ public class TileIOPort extends AENetworkInvTile implements IUpgradeableHost, IC
         if (!this.getProxy().isActive()) {
             return TickRateModulation.IDLE;
         }
+        return this.doWork();
+    }
 
+    private TickRateModulation doWork() {
         TickRateModulation ret = TickRateModulation.SLEEP;
         long itemsToMove = 256;