diff --git a/Runtime/Scripts/Controls/ComboBox/AutoCompleteComboBox.cs b/Runtime/Scripts/Controls/ComboBox/AutoCompleteComboBox.cs
index a59f39e..1350f87 100644
--- a/Runtime/Scripts/Controls/ComboBox/AutoCompleteComboBox.cs
+++ b/Runtime/Scripts/Controls/ComboBox/AutoCompleteComboBox.cs
@@ -95,8 +95,10 @@ namespace UnityEngine.UI.Extensions
 			}
 		}
 
-		//TODO design as foldout for Inspector
-		public Color ValidSelectionTextColor = Color.green;
+        public float DropdownOffset = 10f;
+
+        //TODO design as foldout for Inspector
+        public Color ValidSelectionTextColor = Color.green;
 		public Color MatchingItemsRemainingTextColor = Color.black;
 		public Color NoItemsRemainingTextColor = Color.red;
 
@@ -184,35 +186,6 @@ namespace UnityEngine.UI.Extensions
             return success;
         }
 
-        /* currently just using items in the list instead of being able to add to it.
-        public void AddItems(params object[] list)
-        {
-            List<DropDownListItem> ddItems = new List<DropDownListItem>();
-            foreach (var obj in list)
-            {
-                if (obj is DropDownListItem)
-                {
-                    ddItems.Add((DropDownListItem)obj);
-                }
-                else if (obj is string)
-                {
-                    ddItems.Add(new DropDownListItem(caption: (string)obj));
-                }
-                else if (obj is Sprite)
-                {
-                    ddItems.Add(new DropDownListItem(image: (Sprite)obj));
-                }
-                else
-                {
-                    throw new System.Exception("Only ComboBoxItems, Strings, and Sprite types are allowed");
-                }
-            }
-            Items.AddRange(ddItems);
-            Items = Items.Distinct().ToList();//remove any duplicates
-            RebuildPanel();
-        }
-        */
-
         public void AddItem(string item)
         {
             AvailableOptions.Add(item);
@@ -255,11 +228,19 @@ namespace UnityEngine.UI.Extensions
         /// </summary>
         private void RebuildPanel()
         {
+            if (_isPanelActive) ToggleDropdownPanel();
+
             //panel starts with all options
             _panelItems.Clear();
             _prunedPanelItems.Clear();
             panelObjects.Clear();
 
+            //clear Autocomplete children in scene
+            foreach (Transform child in _itemsPanelRT.transform)
+            {
+                Destroy(child.gameObject);
+            }
+
             foreach (string option in AvailableOptions)
             {
                 _panelItems.Add(option.ToLower());
@@ -363,7 +344,7 @@ namespace UnityEngine.UI.Extensions
 
             if (_panelItems.Count < 1) return;
 
-            float dropdownHeight = _rectTransform.sizeDelta.y * Mathf.Min(_itemsToDisplay, _panelItems.Count);
+            float dropdownHeight = _rectTransform.sizeDelta.y * Mathf.Min(_itemsToDisplay, _panelItems.Count) + DropdownOffset;
 
             _scrollPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Vertical, dropdownHeight);
             _scrollPanelRT.SetSizeWithCurrentAnchors(RectTransform.Axis.Horizontal, _rectTransform.sizeDelta.x);
@@ -424,7 +405,7 @@ namespace UnityEngine.UI.Extensions
         /// Toggle the drop down list
         /// </summary>
         /// <param name="directClick"> whether an item was directly clicked on</param>
-        public void ToggleDropdownPanel(bool directClick)
+        public void ToggleDropdownPanel(bool directClick = false)
         {
             _isPanelActive = !_isPanelActive;
 
diff --git a/Runtime/Scripts/Controls/ComboBox/ComboBox.cs b/Runtime/Scripts/Controls/ComboBox/ComboBox.cs
index 02da2ff..f0b7bbe 100644
--- a/Runtime/Scripts/Controls/ComboBox/ComboBox.cs
+++ b/Runtime/Scripts/Controls/ComboBox/ComboBox.cs
@@ -21,6 +21,9 @@ namespace UnityEngine.UI.Extensions
         [SerializeField]
         private int _itemsToDisplay;
 
+        [SerializeField]
+        private bool _sortItems = true;
+
         [System.Serializable]
         public class SelectionChangedEvent : UnityEngine.Events.UnityEvent<string>
         {
@@ -178,7 +181,7 @@ namespace UnityEngine.UI.Extensions
             {
                 _panelItems.Add(option.ToLower());
             }
-            _panelItems.Sort();
+            if(_sortItems) _panelItems.Sort();
 
             List<GameObject> itemObjs = new List<GameObject>(panelObjects.Values);
             panelObjects.Clear();
diff --git a/Runtime/Scripts/Controls/ComboBox/DropDownList.cs b/Runtime/Scripts/Controls/ComboBox/DropDownList.cs
index b702d46..959c8fe 100644
--- a/Runtime/Scripts/Controls/ComboBox/DropDownList.cs
+++ b/Runtime/Scripts/Controls/ComboBox/DropDownList.cs
@@ -133,9 +133,17 @@ namespace UnityEngine.UI.Extensions
 			return success;
 		}
 
-		/* currently just using items in the list instead of being able to add to it.
-		public void AddItems(params object[] list)
+		// currently just using items in the list instead of being able to add to it.
+		/// <summary>
+		/// Rebuilds the list from a new collection.
+		/// </summary>
+		/// <remarks>
+		/// NOTE, this will clear all existing items
+		/// </remarks>
+		/// <param name="list"></param>
+		public void RefreshItems(params object[] list)
 		{
+			Items.Clear();
 			List<DropDownListItem> ddItems = new List<DropDownListItem>();
 			foreach (var obj in list)
 			{
@@ -157,10 +165,74 @@ namespace UnityEngine.UI.Extensions
 				}
 			}
 			Items.AddRange(ddItems);
-			Items = Items.Distinct().ToList();//remove any duplicates
 			RebuildPanel();
 		}
-		*/
+
+		/// <summary>
+		/// Adds an additional item to the drop down list (recommended)
+		/// </summary>
+		/// <param name="item">Item of type DropDownListItem</param>
+		public void AddItem(DropDownListItem item)
+        {
+			Items.Add(item);
+			RebuildPanel();
+		}
+
+		/// <summary>
+		/// Adds an additional drop down list item using a string name 
+		/// </summary>
+		/// <param name="item">Item of type String</param>
+		public void AddItem(string item)
+		{
+			Items.Add(new DropDownListItem(caption: (string)item));
+			RebuildPanel();
+		}
+
+		/// <summary>
+		/// Adds an additional drop down list item using a sprite image 
+		/// </summary>
+		/// <param name="item">Item of type UI Sprite</param>
+		public void AddItem(Sprite item)
+		{
+			Items.Add(new DropDownListItem(image: (Sprite)item));
+			RebuildPanel();
+		}
+
+		/// <summary>
+		/// Removes an item from the drop down list (recommended)
+		/// </summary>
+		/// <param name="item">Item of type DropDownListItem</param>
+		public void RemoveItem(DropDownListItem item)
+		{
+			Items.Remove(item);
+			RebuildPanel();
+		}
+
+		/// <summary>
+		/// Removes an item from the drop down list item using a string name 
+		/// </summary>
+		/// <param name="item">Item of type String</param>
+		public void RemoveItem(string item)
+		{
+			Items.Remove(new DropDownListItem(caption: (string)item));
+			RebuildPanel();
+		}
+
+		/// <summary>
+		/// Removes an item from the drop down list item using a sprite image 
+		/// </summary>
+		/// <param name="item">Item of type UI Sprite</param>
+		public void RemoveItem(Sprite item)
+		{
+			Items.Remove(new DropDownListItem(image: (Sprite)item));
+			RebuildPanel();
+		}
+
+		public void ResetItems()
+		{
+			Items.Clear();
+			RebuildPanel();
+		}
 
 		/// <summary>
 		/// Rebuilds the contents of the panel in response to items being added.