Data coming blank

Hi, First its nice to have opigno like tool that is so easy to configure. I am trying to play with the tool to set it for my class. Few questions and problems: For the Course statistics, my Course Lessons, Student results is blank, why? I have students added for that course who have taken a lesson. Sorry cant attach the screenshot Why do I see data blank for July and data for August in the report? I have created the course and lessons today and I see the data in reports for Course Report only when I select August 2017 or greater and nothing on July 2017. Can we send notification to admin or coach or teacher when course for student is completed or lesson is completed? If yes how do we customize it? What is the concept of weights in the tool? How do you use and set it. Weight is used in all course, lesson and quiz, category.