I found a bug today where if you logged onto the site and submitted to a challenge without refreshing or clicking onto a different page, the login was not registered and thus the submission was not registered. I have implemented a fix for this so it should be all good now.
If you ever see the message "Your submission has been received" after submitting a challenge rather than a message telling you how your submission scored, there was likely an error in our systems. Please contact us if this ever arises. Also, make sure to check your point total in the leaderboard; all scoring is automatic and it should update automatically.
Several participants have 295 points, which means they received full points for parts B and C, but not part A. This was likely caused by this issue not registering their first submission. If you believe that your point total is lower than it should be, please submit to the respective challenge again. There is no penalty for submitting multiple times, and only your highest scoring submission will be used.