The "Buy now for Amazon" is messing with the "Like" Button for Facebook. Should be able to leave comment when first liking and that box is being cut off by the Amazon button, so cannot comment right.
Also once the like list has filled and you hover to see who all liked it. The Amazon button also covers that up..
just as a reference, like this one and see what happens. http://pwned.com/review/8099/xbox360/Gears-of-War-Triple-Pack/
Quick solution would be just to switch their positions.