If there is one payment (PAY) for the amount shown as a deviation, but the system does not match it to the Bank Statement (BST), the user can try to manually match the payment (PAY) to the Bank statement (BST) items using the F12 option: "Link Payments to open Bank statement Items", or by clicking on the link 'Unmatched amount' (and then click on magnifying glass). 

Please note. This F12 option links the chosen payment(s) to all BST items in ST=2. 

                    One BST item could thus be matched to several payments. 

A recalculating job will run in the background correcting the deviation when this is done.