Its probably because you have not played in three tournaments. If you play in less than three events, your point total is still divided by three. In order to get a realistic ranking, play in at least three tournaments. TennisFax measures a player's performance in selected tournaments. If the better players fail to play in three events, they are likely to be ranked lower than they should.
Bonus points are points earned by beating other players.
A player who was previously undefeated will be worth 10 bonus points to someone who can beat them. Players who are generally semifinalists will be worth 5 points and a player who is not yet ranked is worth 1 point. The scale goes from 10 to 1 and is based on a players finish in Grand Prix tournaments. Bonus points are not based on a player's ranking, but bonus points are very important in determining the rankings. These players usually have played in more tournaments so they are likely to have a few losses.