Well, the short answer is that the scores are not really indicative of anything useful. Scores that appear on hubs are influenced by word count, number of images, comments, and internal traffic, but these things don't have much to do with external search engine traffic -- which is what you actually need to make money on HubPages. Likewise the little number on your profile doesn't reflect anything meaningful except your level of activity on the site.
If you want to increase the number of views your articles are getting, here are a few things I've found to be helpful.
(1) Google articles on the same subject and look at the types of key words that are used. You might be using key word phrases that are not commonly searched for, or not enough synonymous terms.
(2) Make sure you have search engine friendly titles. Clever titles seem not to do as well. If you are really attached to your creative titles, try adding a subtitle.
(3) Link out from your more popular articles. If you have two or three articles that get a lot of hits, you can leverage that to increase the page views for your other articles by creating a few links.