diff --git a/backend/src/event-handlers/rollup.js b/backend/src/event-handlers/rollup.js
index 154e830..a67b1c7 100644
--- a/backend/src/event-handlers/rollup.js
+++ b/backend/src/event-handlers/rollup.js
@@ -107,9 +107,7 @@ const evaluateMatrixPoolOutcome = async (postId) => {
     // TODO: If there's no batch worker, we should stake our availability
     // and then submit the batch immediately.
     await submitBatchPost(batchItems);
-  }
-
-  if (batchWorker === await wallet.getAddress()) {
+  } else if (batchWorker === await wallet.getAddress()) {
     // TODO: If we are the batch worker, we should wait an appropriate amout of time /
     // number of matrix pools before submitting a batch.
   }
@@ -212,6 +210,8 @@ const start = async () => {
   registerMatrixEventHandler(async (client, roomId, event) => {
     switch (event.type) {
       case 'io.dgov.pool.start': {
+        // Note that matrix pools are identified by the postId to which they pertain.
+        // This means that for a given post there can only be one matrix pool at a time.
         const { postId, sender, ...params } = event.content;
         // We can use LevelDB to store information about validation pools
         const eventId = event.event_id;