||IMO, the leaderboard should be refreshed by the newest result, so before the deadline of this stage, the current leaderboard is always changing.
Actually, I'm also competing mostly on TCO eligible challenges, so I care about my rank in the leaderboard and post this issue in this thread.
BTW, if you registered a challenge, it doesn't mean you must gain a point. Competing in a series of challenges will increase the probability of gaining points because they are parts of a same project and you are familiar with it. And, one of your posted examples is the challenge that I won.