It seems I sometimes get a question that I've answered before. This would make the poll results much less meaningful. Maybe you could make the code work with sessions in order to prevent this. Or something like that; I'm not much of a web developer.
Hey Max! Thanks a lot for your feedback. We do use cookies actually (which saves the questions that you've answered) which should ensure that you don't see the same question twice.
Are you sure the questions weren't similar maybe? If you can give me an example it'll really help.