Currently, when I am looking at "Unreviewed transactions" to review them and mark some as reviewed, they stay on the screen barely marked. Also you can't sort by the reviewed status (as the header checkbox marks all as reviewed).

Improve the UX: either make reviewed transactions automatically disappear from the screen (not requiring a full-screen refresh), or add a manual "refresh" button (sticky) or allow sorting the table by reviewed/unreviewed status.