You need a full featured Order Entry program. You are trying to utilize a program that was designed as a 'quick' invoicing solution for businesses with minimal accounting requirements as a full fledged (and notably stressed) order entry and invoicing system!

Adagio Invoices uses a batch system. If you really want the invoices to be in Customer order, you must enter them that way in the first place (I suppose you could also edit the existing batches and change all the customer numbers and then also the items within the invoices to be the way you want - but this is rather time consuming).

Adagio Order Entry has the capability to sort by either Document Number or Customer Number in each of the Orders, Invoices and Credit Notes screens. It also uses the Adagio Designer for the printing of it's documents (Orders, Pickling Slips, Confirmations, Invoices and Credit Notes).

Regards