Hunter, can you check the following sheet you ensure the 'change' values are correct. 

Also, when a product is deactivated, how would you like it represented on the sheet ? i.e. removed completely, flagged as 'deactivated' and N/A in the bid/offer/change fields etc ?

http://fundamentals.corp.enron.com/main.asp?navnodeid=6908&commodityID=1

-Colin