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Upon check, I couldn't reproduce any issues with your form regarding formatting, please review the following screenshot.
I have tested your form on Internet Explorer 10, Apple Safari 5.1.7, and Google Chrome, it is displaying correctly, radio buttons are in vertical position not shuffled. Could you confirm us, which screen resolution you're using, let us know so that we can try to resolve this issue furthermore.
I hope this helps. Let us know further if you need more assistance on this we would be happy to assist you.