Issues with 'Review Quiz'

Hopefully someone can help with this!

I have created a 10 question quiz, which operates and scores correctly. However, when the 'Review Quiz' button is pressed it returns to Question 1 shows the correct answer with a tick, but the banner at the bottom of the screen shows as 'incorrect' and there is no way to move on to review the rest of the answers. I suspect I am missing something very simple - but it is getting to me now that I can't work it out!!

I've attached a screen shot in case my explanation is muddles!

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