How does the leaderboard work I have completed 2 project but still my score shows 00 and for project 1 I got a perfect 10 score

i had already submitted my 1st project of data analytics process and you guys approved my project with the score of perfect 10 now i have submitted my 2nd project of data analytics process, my project submitted sucessfully but my previously submitted project score in not visible on the dashboard. it shows 00 now.