Pro Users: When transactions come through, they'll initially be marked as "unassigned." You’ll need to assign these transactions to the appropriate envelope. You can easily do so by tapping, or long pressing, on the transaction and choosing the best envelope.
Once you assign a transaction to an envelope, you will be able to see it in that envelope's activity screen.
If you mis-categorize a transaction, you can tap or long press the transaction to recategorize it.