Those hub scores are always changing for all hubs. When you first publish, it's normal that the hub has a low score. The score will change in the days to come. It's always fluctuating.
I see this in the scores of my own hubs whenever I go to "my account". The hubs position in the list change pretty often and sometimes their scores will rise or fall. It's rather like your hubber score, which also fluctuates.
Initially, when you first start a hub, the score will be really low but it will soon climb and will be much higher as time passes. If you publish a hub soon after you created it, then the score will be much lower as compared to others that took days upon creating a hub before publishing it. I have hubs that I created but haven't published yet and their scores started really low. They soon increased though they are still fluctuating as with the other hubs that have been published.