I intended to flag the answer as 'not an answer', but clicked on "no action needed". Is there a way to go back and correct my review?
I normally click the back button and access the problem post directly (it will be linked), the perform the necessary actions on the question outside the review queue.
Also, don't worry about a mistake - it isn't binding, it needs (3?) more wrong votes to keep it open. (And I've just flagged etc. that one!)
But, as Seth says - do go back!