Result from CTE query not sorted by Level, why?
===

I am using a recursive query to find out all the parents from a Hierarchy table, for items from Items table; I thought the result should be by Level, but it is not... I know I can sort it using order by, I just think the output itself should be ordered by Level because the Recursive Memeber is run by Level, right? 

				WITH Result(ItemID, ParentID, Level)
				AS
				(
					--get the anchor member from tbItems
					SELECT itemID, itemParentID, 0 AS Level
					FROM   tbItems	WHERE
						approved = 0 
					UNION ALL
					--recursive member from tbHierarchy
					SELECT h.hierarchyItemID, h.parentItemID, Level + 1
					FROM tbHierarchy AS h
					INNER JOIN
						Result AS r
							ON
							h.hierarchyItemID = r.ParentID          
				        
				)
				SELECT *
				FROM Result

the Result is:

		ItemID      ParentID    Level
		----------- ----------- -----------
		7           3           0
		11          2           0
		18          11          0
		19          11          0
		21          54          0
		31          2           0
		33          36          0
		34          36          0
		35          36          0
		36          36          0
		38          2           0
		39          2           0
		40          2           0
		54          4           0
		**** the above is anchor member, the numbers are correct  
		4           1           1
		1           0           2
		2           1           1
		1           0           2
		2           1           1
		1           0           2
		2           1           1
		1           0           2
		36          35          1
		35          8           2
		8           1           3
		1           0           4
		36          35          1
		35          8           2
		8           1           3
		1           0           4
		36          35          1
		35          8           2
		8           1           3
		1           0           4
		36          35          1
		35          8           2
		8           1           3
		1           0           4
		2           1           1
		1           0           2
		54          12          1
		12          1           2
		1           0           3
		11          1           1
		1           0           2
		11          1           1
		1           0           2
		2           1           1
		1           0           2
		3           1           1
		1           0           2
