using Coalesce

the problem i am having with this procedure is the item number (i.item) for each user store shows up for all userid. BAsically it takes the first userid item number and use it for all userid.
It  not suppose to be the same for each row. It works correctly with a regular join.



DECLARE @userid VARCHAR(MAX)
DECLARE @orderid int
select orderid, ( select  COALESCE(i.Item + '', '') + CASE when i.Quantity < 10 THEN '0' ELSE '' END + cast(i.Quantity AS varchar(3)) + 'A'
 from OrderDetail i
where   t.DateCreated > t.Submitted OR t.Submitted is NULL  for xml path ('') )Item
 , t.userid
  from Orders t
order by t.orderid desc


example.
orderid         item       userid
1                1234567    tony
2                1234567    james
3                1234567    jessy

what i need is.

orderid         item       userid
1                1234567    tony
2                6545654    james
3                5643345    jessy