#AskEden - Average Review Rating on Product Page?

I'm currently looking at the Jopen Key Lo - Vibrator Kit and I can see when I'm on the product page that there are only three reviews of this item that I can see; two 3-star reviews and one 2-star review; however, the "average review rating" shows four stars highlighted in yellow. When I hover over the stars, a little blurb pops up that says, "Rating: 2.7 out of 5." Why does it show four stars when in fact the average is lower, which is confirmed when hovering over the stars? I find this to be a misleading visual representation, especially when this is what most people go by initially before looking into a product further. Does anyone have any further information or insight on this? Thanks! less