When I view my profile on Stack Overflow Careers, it says that I have a 207/210 score. It also tells me that I should tag my projects to improve my profile:
I tagged all I could tag and I still couldn't get those remaining 3 points for a perfect score.
When I click the "View completeness report" link thought, it give me a different recommendation of entering more responsibilites for those points.
I would think the site would give you the correct incompleteness information on the profile page.