Same review visible multiple times

I just got a review for my plugin Simple History (https://ww.wp.xz.cn/support/view/plugin-reviews/simple-history). The review does however show up two times, one time with no stars as the rating, and then again above with 5 stars. Now I’m worried that the wierd 0-star review will effect my average rating.

Here’s a screenshot of it in action:
http://bit.ly/207Bs7n

Both reviews goes to the same page btw, so it must really be something odd going on.