The score next to your hub's title is the score for the hub itself. The score in the upper right next to your profile picture is your author score. They each will fluctuate based on the interest and traffic of your hubs and your quality as an author. You can click on the link at the bottom of this page labeled learning center and you should be able to find a more in-depth description of what goes into these scores. Good Luck and God Bless!