I think she reviewed the different editions of her book separately, not realizing that Amazon would put them together. Notice how one of them has a note about being about the paperback version.

Also, the review is ostensibly from some other publication that she's reposting there, but I have no idea how reputable it is, or whether it actually gave her book a rating equivalent to five stars. Either way, her reposting it is still kinda fail, but not as much as her husband's crappy review.