diff --git a/LibreMetaverse/ParcelManager.cs b/LibreMetaverse/ParcelManager.cs
index 6e878fa..7fef2cf 100644
--- a/LibreMetaverse/ParcelManager.cs
+++ b/LibreMetaverse/ParcelManager.cs
@@ -617,18 +617,52 @@ namespace OpenMetaverse
             Update(client, client.Network.CurrentSim, wantReply);
         }
 
+        /// <summary>
+        /// UpdateParcelAccessList - Update the parcel access or ban list on the simulator
+        /// </summary>
+        /// <param name="Client">The grid client we are using</param>
+        /// <param name="flags">what list to update sending AccessList.Both will result in a warning</param>
+        /// <param name="entries">list of avatar entry records</param>
         public void UpdateParcelAccessList(
             GridClient Client,
             AccessList flags,
             List<ParcelManager.ParcelAccessEntry> entries)
         {
-            if(Client == null) throw new InvalidOperationException("Client is null");
-            if(Client.Network == null) throw new InvalidOperationException("Client.Network is null");
-            if(Client.Network.CurrentSim == null) throw new InvalidOperationException("Client.Network.CurrentSim is null");
+            // based on Alchemy Viewer's implementation
+            // might want to be cleaned up later
+            if (flags == AccessList.Both)
+            {
+                Logger.Log("Warning: UpdateParcelAccessList called with AccessList.Both, this is not supported. " +
+                    "Use AccessList.Access or AccessList.Ban", Helpers.LogLevel.Warning);
+                return;
+            }
+            if (Client == null)
+            {
+                Logger.Log("Client is null", Helpers.LogLevel.Error);
+                return;
+            }
+            if (Client.Network == null)
+            {
+                Logger.Log("Client.Network is null", Helpers.LogLevel.Error);
+                return;
+            }
+            if (Client.Network.CurrentSim == null)
+            {
+                Logger.Log("Client.Network.CurrentSim is null", Helpers.LogLevel.Error);
+                return;
+            }
             Simulator simulator = Client.Network.CurrentSim;
-            if (simulator == null) throw new InvalidOperationException("No current simulator");
+            if (Client.Network.CurrentSim == null)
+            {
+                Logger.Log("simulator is null", Helpers.LogLevel.Error);
+                return;
+            }
             int parcelLocalId = LocalID;
-            if (parcelLocalId == 0) throw new InvalidOperationException("Parcel LocalID is zero");
+            if (parcelLocalId == 0) 
+            {
+                Logger.Log("Parcel LocalID is zero", Helpers.LogLevel.Error);
+                return;
+            }
             if (entries.Count == 0)
             {
                 // send an empty block to clear the list
@@ -659,7 +693,7 @@ namespace OpenMetaverse
                 return;
             }
 
-            const int PARCEL_MAX_ENTRIES_PER_PACKET = 48; // Set to your actual max
+            const int PARCEL_MAX_ENTRIES_PER_PACKET = 48; // ?? matching viewer's limit, but not documented anywhere
             int count = entries.Count;
             int numSections = (int)Math.Ceiling((double)count / PARCEL_MAX_ENTRIES_PER_PACKET);
             int sequenceId = 1;
diff --git a/SecondBotEvents/Commands/ParcelCommands.cs b/SecondBotEvents/Commands/ParcelCommands.cs
index 71eed35..6336035 100644
--- a/SecondBotEvents/Commands/ParcelCommands.cs
+++ b/SecondBotEvents/Commands/ParcelCommands.cs
@@ -591,15 +591,7 @@ namespace SecondBotEvents.Commands
             {
                 return Failure("Invaild avatar", [avatar]);
             }
-            bool alreadyBanned = false;
-            foreach (ParcelAccessEntry E in targetparcel.AccessBlackList)
-            {
-                if (E.AgentID == avataruuid)
-                {
-                    alreadyBanned = true;
-                    break;
-                }
-            }
+            bool alreadyBanned = targetparcel.AccessBlackList.Any(e => e.AgentID == avataruuid);
             if (alreadyBanned == true)
             {
                 return BasicReply("Avatar is in the blacklist", [avatar]);
@@ -611,7 +603,7 @@ namespace SecondBotEvents.Commands
                 Time = new System.DateTime(3030, 03, 03)
             };
             targetparcel.AccessBlackList.Add(entry);
-            targetparcel.Update(GetClient());
+            targetparcel.UpdateParcelAccessList(GetClient(), AccessList.Ban, targetparcel.AccessBlackList);
             return BasicReply("ok", [avatar]);
         }
 
@@ -635,23 +627,18 @@ namespace SecondBotEvents.Commands
             {
                 return Failure("Invaild avatar", [avatar]);
             }
-            bool alreadyBanned = false;
-            ParcelAccessEntry removeentry = new();
-            foreach (ParcelAccessEntry E in targetparcel.AccessBlackList)
-            {
-                if (E.AgentID == avataruuid)
-                {
-                    alreadyBanned = true;
-                    removeentry = E;
-                    break;
-                }
-            }
+            bool alreadyBanned = targetparcel.AccessBlackList.Any(e => e.AgentID == avataruuid);
             if (alreadyBanned == false)
             {
                 return BasicReply("Avatar is already unbanned", [avatar]);
             }
-            targetparcel.AccessBlackList.Remove(removeentry);
-            targetparcel.Update(GetClient());
+            // Find the entry to remove
+            var entryToRemove = targetparcel.AccessBlackList.FirstOrDefault(e => e.AgentID == avataruuid);
+            if (entryToRemove.AgentID != UUID.Zero)
+            {
+                targetparcel.AccessBlackList.Remove(entryToRemove);
+            }
+            targetparcel.UpdateParcelAccessList(GetClient(), AccessList.Ban, targetparcel.AccessBlackList);
             return BasicReply("ok", [avatar]);
         }