Yes it is. We have 3847 registered players out of which 131 have top scores... We don't show the full leaderboard; only the top 30, and then you, you +3, you -3 so you know where you are approximately. Granted, this could be made clearer...
On 1.: you need to solve all questions in the challenge for the challenge to turn green. Try re-submitting your solutions. It should have remembered them.
On 2.: the results should not be arranged as a cross; the source is.