In "Account Enquiry" reports there is a column headed "Number". Which field is (supposed to be) reported - and where is that field entered? (I was expecting it to be the Reference field)
This number will only show from transaction types, like journals, and its an automatically assigned number, not one you can enter your self. Receipts and Payments dont have this number. Best suggestion I can make, is to add the details column to report, and in the receipts and payments enter a number in the details box. Then you can track the details in the transaction to that on the report.