diff --git a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
index c203747..b2be125 100644
--- a/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
+++ b/AIStudio.Wpf.DiagramDesigner/ViewModels/DefaultViewModel/BlockDesignerItemViewModel.cs
@@ -5,6 +5,7 @@ using System.Linq;
 using System.Text;
 using System.Threading.Tasks;
 using AIStudio.Wpf.DiagramDesigner.Models;
+using static System.Net.Mime.MediaTypeNames;
 
 namespace AIStudio.Wpf.DiagramDesigner
 {
@@ -42,17 +43,36 @@ namespace AIStudio.Wpf.DiagramDesigner
 
         public void AddNext(BlockDesignerItemViewModel next)
         {
-            this.ParentId = new Guid();
-            this.Parent = null;
+            if (this.Next == next)
+            {
+                AlignNext(next);
+                return;
+            }
+            RemoveNext();
+
             next.Left = this.Left;
             next.Top = this.Top + this.GetItemHeight();
             next.ParentId = this.Id;
             next.Parent = this;
             this.Next = next;
-            //if (oldnext != null)
-            //{
-            //    next.AddNext(oldnext);
-            //}
+            if (next.Next != null)
+            {
+                next.AlignNext(next.Next);
+            }
+        }
+
+        public void AlignNext(BlockDesignerItemViewModel next)
+        {
+            if (next != null && this.Next == next)
+            {
+                next.Left = this.Left;
+                next.Top = this.Top + this.GetItemHeight();
+                if (next.Next != null)
+                {
+                    next.AlignNext(next.Next);
+                }
+                return;
+            }
         }
 
         public void RemoveNext()
@@ -100,12 +120,16 @@ namespace AIStudio.Wpf.DiagramDesigner
         {
             child.RemoveFromSelection();
             this.AddToSelection(true, false);
+
+            AlignNext(this.Next);
         }
 
         public virtual void RemoveChild(BlockDesignerItemViewModel child)
         {
             this.RemoveFromSelection();
             child.AddToSelection(true, false);
+
+            AlignNext(this.Next);
         }
 
         public ObservableCollection<ItemsContainerInfo> Contains