diff --git a/app/javascript/template_builder/dynamic_variables.vue b/app/javascript/template_builder/dynamic_variables.vue
index a683cc46..6fec9162 100644
--- a/app/javascript/template_builder/dynamic_variables.vue
+++ b/app/javascript/template_builder/dynamic_variables.vue
@@ -22,28 +22,30 @@
             class="border-base-300"
           >
           <label class="peer flex items-center py-1.5 cursor-pointer select-none">
-            <input
-              type="checkbox"
-              class="hidden peer"
-              checked
-            >
-            <IconChevronDown
-              class="hidden peer-checked:block"
-              :width="14"
-              :stroke-width="1.6"
-            />
-            <IconChevronRight
-              class="block peer-checked:hidden"
-              :width="14"
-              :stroke-width="1.6"
-            />
+            <span class="w-5 flex justify-center items-center">
+              <input
+                type="checkbox"
+                class="hidden peer"
+                checked
+              >
+              <IconChevronDown
+                class="hidden peer-checked:block ml-0.5"
+                :width="14"
+                :stroke-width="1.6"
+              />
+              <IconChevronRight
+                class="block peer-checked:hidden ml-0.5"
+                :width="14"
+                :stroke-width="1.6"
+              />
+            </span>
             <span class="ml-1">{{ key }}</span>
             <span
               v-if="node.type === 'array'"
               class="text-xs bg-base-200 rounded px-1 ml-1"
             >{{ t('list') }}</span>
           </label>
-          <div class="hidden peer-has-[:checked]:block pl-3.5">
+          <div class="hidden peer-has-[:checked]:block pl-5">
             <template
               v-for="[varNode, varPath] in nestedVariables(node, key)"
               :key="varPath"
@@ -101,7 +103,7 @@ export default {
   },
   methods: {
     isGroup (node) {
-      return (node.type === 'object' && node.properties) || (node.type === 'array' && node.items?.properties)
+      return (node.type === 'object' && node.properties) || (node.type === 'array' && node.items?.type === 'object' && node.items?.properties)
     },
     nestedVariables (node, groupKey) {
       const properties = node.type === 'array' ? node.items?.properties : node.properties
diff --git a/app/javascript/template_builder/dynamic_variables_schema.js b/app/javascript/template_builder/dynamic_variables_schema.js
index f66deea0..f085b0b4 100644
--- a/app/javascript/template_builder/dynamic_variables_schema.js
+++ b/app/javascript/template_builder/dynamic_variables_schema.js
@@ -353,7 +353,26 @@ function extractConditionVariables (node, acc = []) {
   return acc
 }
 
+const IRREGULAR_PLURALS = {
+  people: 'person',
+  men: 'man',
+  women: 'woman',
+  children: 'child',
+  teeth: 'tooth',
+  feet: 'foot',
+  mice: 'mouse',
+  geese: 'goose',
+  oxen: 'ox',
+  criteria: 'criterion',
+  phenomena: 'phenomenon',
+  alumni: 'alumnus',
+  data: 'datum',
+  media: 'medium'
+}
+
 function singularize (word) {
+  if (IRREGULAR_PLURALS[word]) return IRREGULAR_PLURALS[word]
+
   if (word.endsWith('ies')) return word.slice(0, -3) + 'y'
   if (word.endsWith('ches') || word.endsWith('shes')) return word.slice(0, -2)
   if (word.endsWith('ses') || word.endsWith('xes') || word.endsWith('zes')) return word.slice(0, -2)
@@ -513,6 +532,12 @@ function processOperators (operators, propertiesHash = {}, parentProperties = {}
 
         assignNestedSchema(propertiesHash, parentProperties, op.variableName, { type: 'array', items: itemProperties })
         processOperators(op.children, propertiesHash, { ...parentProperties, [singularKey]: itemProperties })
+
+        if (itemProperties.type === 'object' && itemProperties.properties && Object.keys(itemProperties.properties).length === 0) {
+          delete itemProperties.properties
+          itemProperties.type = 'string'
+        }
+
         break
       }
     }