diff --git a/src/js/game/systems/filter.js b/src/js/game/systems/filter.js
index 547b3e6c..e8008bf8 100644
--- a/src/js/game/systems/filter.js
+++ b/src/js/game/systems/filter.js
@@ -4,6 +4,8 @@ import { Entity } from "../entity";
 import { GameSystemWithFilter } from "../game_system_with_filter";
 import { BOOL_TRUE_SINGLETON } from "../items/boolean_item";
 
+const MAX_ITEMS_IN_QUEUE = 2;
+
 export class FilterSystem extends GameSystemWithFilter {
     constructor(root) {
         super(root, [FilterComponent]);
@@ -62,7 +64,7 @@ export class FilterSystem extends GameSystemWithFilter {
             listToCheck = filterComp.pendingItemsToReject;
         }
 
-        if (!listToCheck.length) {
+        if (listToCheck.length >= MAX_ITEMS_IN_QUEUE) {
             // Busy
             return false;
         }
diff --git a/src/js/game/systems/item_acceptor.js b/src/js/game/systems/item_acceptor.js
index 5b3ed3ca..db9bc7e1 100644
--- a/src/js/game/systems/item_acceptor.js
+++ b/src/js/game/systems/item_acceptor.js
@@ -70,7 +70,7 @@ export class ItemAcceptorSystem extends GameSystemWithFilter {
 
                 if (!chunk.tileSpaceRectangle.containsPoint(realSlotPos.x, realSlotPos.y)) {
                     // Not within this chunk
-                    return;
+                    continue;
                 }
 
                 const fadeOutDirection =
diff --git a/src/js/game/systems/item_processor.js b/src/js/game/systems/item_processor.js
index cbc3f204..3f700dff 100644
--- a/src/js/game/systems/item_processor.js
+++ b/src/js/game/systems/item_processor.js
@@ -285,11 +285,11 @@ export class ItemProcessorSystem extends GameSystemWithFilter {
         // only remove one item from each slot - we don't want to delete extra items!
         let usedSlots = [];
         for (let i = 0; i < acceptorComp.completedInputs.length; i++) {
-            const slot = acceptorComp.completedInputs[i].slotIndex;
+            const index = acceptorComp.completedInputs[i].slotIndex;
 
-            if (!usedSlots.includes(slot)) {
-                usedSlots.push(slot);
-                acceptorComp.completedInputs.splice(i);
+            if (!usedSlots.includes(index)) {
+                usedSlots.push(index);
+                acceptorComp.completedInputs.splice(i, 1);
                 i--;
             }
         }