I have been reconciling my checking account going back 7 years. The transactions were all entered and categorized. They are mostly correct, and most were downloaded over the years.
Most times the reconciliation shows a zero deviance, and all is good. Sometimes, and I have no idea of a common thread when this happens, the balance will be out by, let's say, one deposit. (not always, sometimes a debit also). If I go to "New" or "Edit" and look for the transaction, it is there, and is correctly dated. I will copy the transaction, paste it as a new transaction, go back to the reconciliation window, and see the transaction and the balance is fine. I will complete the reconciliation and return to the register. I will see the reconciled transaction, and the cleared, not reconciled, transaction, which I then delete (otherwise the current account balance is wrong).
So why is this a pretty constant, nothing more than irritating occurrence?