diff --git a/www/cgi/get_pattern_element_list.cgi b/www/cgi/get_pattern_element_list.cgi
index c86e0fa7..74424446 100755
--- a/www/cgi/get_pattern_element_list.cgi
+++ b/www/cgi/get_pattern_element_list.cgi
@@ -25,7 +25,7 @@ def main():
     # Handle unweighted genecarts which are not saved to tabfile.
     # NOTE: Does not check db for existence of unweighted genecart
     if scope == "unweighted-list":
-        result.append({"label":"unweighted", "top_up":[], "top_down":[], "binary": True})
+        result.append({"label":"unweighted", "top_up":"", "top_down":"", "binary": True})
         print(json.dumps(result))
         return
 
diff --git a/www/js/projection.js b/www/js/projection.js
index cac20b60..b54d04a9 100644
--- a/www/js/projection.js
+++ b/www/js/projection.js
@@ -366,13 +366,17 @@ const selectPatternWeightResult = async (label) => {
 
     // if projection algorithm is "nmf", then hide the top_down genes
     const projectionAlgorithm = document.getElementById('algorithm').value;
+
+    const topDownGenesElement = document.getElementById('top-down-genes');
+
+    // Hide the element initially
+    topDownGenesElement.classList.add('is-hidden');
+
     if (projectionAlgorithm === 'nmf') {
-        //document.getElementById('svg-scoring-method').value = 'top_up';   ? Why is this here? Not a valid value
-        document.getElementById('top-down-genes').classList.add('is-hidden');
-    } else {
-        if (obj.top_down) {
-            document.getElementById('top-down-genes').classList.remove('is-hidden');
-        }
+        // No additional action needed as the element is already hidden
+    } else if (obj.top_down) {
+        // Show the element if 'top_down' property is true
+        topDownGenesElement.classList.remove('is-hidden');
     }
 
     // if isMulti=false, show top_up and top_down genes