diff --git a/src/RTree/RTree.cs b/src/RTree/RTree.cs
index 1b03e42..7c655bd 100644
--- a/src/RTree/RTree.cs
+++ b/src/RTree/RTree.cs
@@ -204,7 +204,7 @@ private void Insert(RTreeNode<T> item, int level)
 			}
 
 			// adjust bboxes along the insertion path
-			AdjutsParentBounds(envelope, insertPath, level);
+			AdjustParentBounds(envelope, insertPath, level);
 		}
 
 		private static int CombinedArea(Envelope what, Envelope with)
@@ -416,24 +416,26 @@ public void Remove(T item, Envelope envelope)
 
 		private void CondenseNodes(IList<RTreeNode<T>> path)
 		{
+            var count = path.Count;
+
 			// go through the path, removing empty nodes and updating bboxes
-			for (var i = path.Count - 1; i >= 0; i--)
+			for (var i = 0; i < count; i++)
 			{
-				if (path[i].Children.Count == 0)
+                if (path[i].Children.Count == 0)
 				{
-					if (i == 0)
+                    if (i == count - 1)
 					{
-						Clear();
+                        Clear();
 					}
 					else
 					{
-						var siblings = path[i - 1].Children;
-						siblings.Remove(path[i]);
-					}
+                        var siblings = path[i + 1].Children;
+                        siblings.Remove(path[i]);
+                    }
 				}
 				else
 				{
-					RefreshEnvelope(path[i]);
+                    RefreshEnvelope(path[i]);
 				}
 			}
 		}
@@ -456,7 +458,7 @@ private static Envelope SumChildBounds(RTreeNode<T> node, int startIndex, int en
 			return retval;
 		}
 
-		private static void AdjutsParentBounds(Envelope bbox, List<RTreeNode<T>> path, int level)
+		private static void AdjustParentBounds(Envelope bbox, List<RTreeNode<T>> path, int level)
 		{
 			// adjust bboxes along the given tree path
 			for (var i = level; i >= 0; i--)