To speed up processing of sales invoices as a bookkeeper (where client just types invoice) i tried to use AE. Although the invoices were in number order when they left me, AE does not necessarily process them and publish them in the same order. When they land in Sage they are allocated the next invoice number, not the number that is on the actual invoice. System is fine for clients producing invoices on the run, but not for bookkeepers operating from a pile of paper.