This is also happening to me - as soon as I go to Unreviewed Transactions - I select "Business" and it automatically categorizes the transaction - and this is not due to a Rule that I've created. It very briefly shows a category - and then disappears. No option to select anything before hitting Enter. Same for Personal transactions. A millisecond goes by and there's no option to select any Category. It simply auto-marks it as complete.  I need to categorize so I can file my taxes. Now what?