Quiz answers showing up twice?

Hi all,

When publishing/previewing some quiz slides, my answers show up twice. Specifically, for some with "fly in from right" animation, the answer will fly in without the radio button first, and then the same answer will fly in on top of it with a radio button. This makes for very garbled text. Selecting and submitting the right answer still works, it's just illegible to anyone who didn't write the course.

To get specific on the animation, all of my quiz questions are using fly in from right and slightly staggered so that the top answer shows up first and the bottom answer shows up last. While I've applied this effect to all questions, the double text thing is only happening on some of them. Question type doesn't seem to matter; I have T/F and multiple choice questions with this problem, and I have T/F and multiple choice questions that work just fine. Any light that anyone could shed here would be greatly appreciated.