Why is a transaction not classified?

Use the source transaction number to search for the transaction that wasn't classified. Is the status of the transaction or an event record of the transaction obsolete? You can run Revert Transaction for the obsolete transaction for an event date. Then run classification again.

An example of this situation is to import a transaction with one event date, then import it again with a different event date. The transaction with the original event date is obsolete and isn't classified.