diff --git a/web/app/static/js/modules/corpus_analysis/view/ResultsView.js b/web/app/static/js/modules/corpus_analysis/view/ResultsView.js
index b1378831..6fc440f9 100644
--- a/web/app/static/js/modules/corpus_analysis/view/ResultsView.js
+++ b/web/app/static/js/modules/corpus_analysis/view/ResultsView.js
@@ -47,18 +47,13 @@ class ResultsList extends List {
      * expert view. Collected here to delete later on.
      */
     this.currentExpertTokenElements = {};
-     /**
-      * Holds True/false for check buttons used to add matches to sub-results.
-      * If checked, it is True. If unchecked, it is false. Buttons for this
-      * have the class add. The ittle round check buttons to add matches to sub
-      * results.
-      */
-    this.addToSubResultsStatus = {};
     /**
-     * If a check button is pressed its corresponding data_index is saved in
-     * this set. The set is shown to the user.
+     * Holds True/false for check buttons used to add matches to sub-results.
+     * If checked, it is True. If unchecked, it is false. Buttons for this
+     * have the class add. The ittle round check buttons to add matches to sub
+     * results. Key is match index. Value is true or false as mentioned above.
      */
-    this.addToSubResultsIdsToShow = new Set();
+    this.subResultsIndexes = {};
     // ViewEventListeners listening for client notifications.
     this.notificationListeners = {};
     this.knownHTMLElements = new Set();
@@ -78,6 +73,7 @@ class ResultsList extends List {
   resetFields() {
     this.addToSubResultsIdsToShow = new Set();
     this.addToSubResultsStatus = {};
+    this.subResultsIndexes = {};
   }
 
 
@@ -231,32 +227,37 @@ class ResultsList extends List {
    * removes it.
    */
   addToSubResults(dataIndex, client, tableCall=true) {
-    if (!this.addToSubResultsStatus[dataIndex]
-        || this.addToSubResultsStatus === undefined) {
-      // add button is activated because status is either false or undefined
+    let toShowArray;
+    dataIndex = parseInt(dataIndex);
+    if (!this.subResultsIndexes[dataIndex]
+        || this.subResultsIndexes === undefined) {
       this.helperActivateAddBtn(event.target);
-      this.addToSubResultsStatus[dataIndex] = true;
+      this.subResultsIndexes[dataIndex] = true;
+      toShowArray = Object.keys(this.subResultsIndexes).map(index => parseInt(index));
       // Add 1 because indexes are zero based. User sees 1 based numbering.
-      this.addToSubResultsIdsToShow.add(dataIndex + 1);
+      toShowArray = toShowArray.map(index => index + 1);
       // Allways sort the shown indexes for the user if new match is added.
-      this.subResultsMatchIds.textContent = [...this.addToSubResultsIdsToShow].sort(function(a, b){return a-b}).join(", ");
-      M.textareaAutoResize(this.subResultsMatchIds);
-      this.nrMarkedMatches.textContent = [...this.addToSubResultsIdsToShow].length;
-    } else if (this.addToSubResultsStatus[dataIndex]) {
+      toShowArray = toShowArray.sort(function(a, b){return a-b});
+      this.subResultsIndexesDisplay.textContent = toShowArray.join(', ');
+      M.textareaAutoResize(this.subResultsIndexesDisplay);
+      this.nrMarkedMatches.textContent = Object.keys(this.subResultsIndexes).length;
+    } else if (this.subResultsIndexes[dataIndex]) {
       // add button is deactivated because status is true
       this.helperDeactivateAddBtn(event.target);
-      this.addToSubResultsStatus[dataIndex] = false;
+      delete this.subResultsIndexes[dataIndex];
+      toShowArray = Object.keys(this.subResultsIndexes).map(index => parseInt(index));
       // Add 1 because indexes are zero based. User sees 1 based numbering.
-      this.addToSubResultsIdsToShow.delete(dataIndex + 1);
+      toShowArray = toShowArray.map(index => index + 1);
       // Allways sort the shown indexes for the user if new match is added.
-      this.subResultsMatchIds.textContent = [...this.addToSubResultsIdsToShow].sort(function(a, b){return a-b}).join(", ");
-      this.nrMarkedMatches.textContent = [...this.addToSubResultsIdsToShow].length;
-      M.textareaAutoResize(this.subResultsMatchIds);
+      toShowArray = toShowArray.sort(function(a, b){return a-b});
+      this.subResultsIndexesDisplay.textContent = toShowArray.join(', ');
+      this.nrMarkedMatches.textContent = Object.keys(this.subResultsIndexes).length;
+      M.textareaAutoResize(this.subResultsIndexesDisplay);
     }
     // Toggles create button according to the number of ids in addToSubResultsIdsToShow
-    if ([...this.addToSubResultsIdsToShow].length > 0 && !client.isBusy) {
+    if (Object.keys(this.subResultsIndexes).length > 0 && !client.isBusy) {
       this.subResultsCreate.classList.toggle('disabled', false);
-    } else if ([...this.addToSubResultsIdsToShow].length === 0) {
+    } else if (Object.keys(this.subResultsIndexes).length === 0) {
       this.subResultsCreate.classList.toggle('disabled', true);
     }
     /**
@@ -338,7 +339,7 @@ class ResultsList extends List {
     if (client.dynamicMode) {
       // Notify Client to get results from server.
       this.notifyClient('get-results', {resultsType: 'inspect-results',
-                                        dataIndexes: [dataIndex],
+                                        dataIndexes: dataIndex,
                                         resultsList: this});
     } else {
       // Gather results data from already present data.
@@ -362,9 +363,9 @@ class ResultsList extends List {
      * Checks if the match has or has not been added to sub results yet.
      * Sets the color and status of the button accordingly.
      */
-    if (this.addToSubResultsStatus[dataIndex[0]]) {
+    if (this.subResultsIndexes[dataIndex[0]]) {
       this.helperActivateAddBtn(addToSubResultsIdsBtn.firstElementChild);
-    } else if (!this.addToSubResultsStatus[dataIndex[0]]) {
+    } else if (!this.subResultsIndexes[dataIndex[0]]) {
       this.helperDeactivateAddBtn(addToSubResultsIdsBtn.firstElementChild);
     }
     this.createInspectMenu.innerHTML = '';
diff --git a/web/app/static/js/modules/corpus_analysis/view/callbacks.js b/web/app/static/js/modules/corpus_analysis/view/callbacks.js
index eeb71f0d..786712e6 100644
--- a/web/app/static/js/modules/corpus_analysis/view/callbacks.js
+++ b/web/app/static/js/modules/corpus_analysis/view/callbacks.js
@@ -17,7 +17,7 @@ function disableElementsGeneralCallback(resultsList, detail) {
 function enableElementsGeneralCallback(resultsList, detail) {
   if (!detail.client.isBusy) {
     resultsList.fullResultsCreate.classList.toggle('disabled', false);
-    if (resultsList.addToSubResultsIdsToShow.size > 0) {
+    if (Object.keys(resultsList.subResultsIndexes).length > 0) {
       resultsList.subResultsCreate.classList.toggle('disabled', false);
     }
     resultsList.toggleInspectButtons(detail.client);
@@ -80,7 +80,7 @@ function queryDataPreparingCallback(resultsList, detail) {
     '#query-results-user-feedback',
     '#query-progress-bar',
     '#query-results-create',
-    '#sub-results-match-ids',
+    '#sub-results-indexes-display',
     '#nr-marked-matches',
    ]);
   // show or enable some things for the user
@@ -96,7 +96,7 @@ function queryDataPreparingCallback(resultsList, detail) {
   resultsList.textLookupTitles.textContent = '';
   resultsList.textLookupCount.textContent = 0;
   resultsList.nrMarkedMatches.textContent = 0;
-  resultsList.subResultsMatchIds.textContent = '';
+  resultsList.subResultsIndexesDisplay.textContent = '';
   resultsList.resetFields();
 }
 
@@ -226,7 +226,7 @@ function resultsDataRecievedCallback(resultsList, detail) {
       resultsList.subResultsProgressBar.classList.toggle('hide', true);
     }
   } else if (detail.type ==='inspect-results') {
-    if (resultsList.addToSubResultsIdsToShow.size === 0) {
+    if (Object.keys(resultsList.subResultsIndexes).length === 0) {
       /**
       * Prevent create sub results button from being activated if it is disabled
       * and no matches have been marked by the user for sub results creation.
diff --git a/web/app/templates/interactions/create.html.j2 b/web/app/templates/interactions/create.html.j2
index d2c8a798..4d4172b0 100644
--- a/web/app/templates/interactions/create.html.j2
+++ b/web/app/templates/interactions/create.html.j2
@@ -14,7 +14,7 @@ results.-->
     <div class="col s12">
       <div class="input-field">
         <p><span id="nr-marked-matches"></span> matches added for sub-results:</p>
-        <textarea id="sub-results-match-ids"
+        <textarea id="sub-results-indexes-display"
                   class="materialize-textarea"
                   disabled>
         </textarea>