When rating an element with 1 star, the vote is not registered. It is removed if it was previously voted with a different number.
Steps to reproduce
1.- Set as rating style for blogs "stars"
2.- Create a blog entry in a page
3.- Try to rate the entry with 1 star
The vote is not registered. It is worse if the user has previously voted (with 2 stars, for example), because the vote is deleted.
The vote is included and shown, the number of votes is increased