We are sorry for any inconvenience caused by the bug in the countdown display which may be misleading.
As pointed out by Eric, the server allows for 2 submissions every sliding window of 24 hours (this rule as well as others are mentioned in the guidelines for participant doc available on the home page).
So let’s say for instance you submit at H=0 and then again at H=n < 24, you will be allowed to resubmit at H=24, and then again at H=24+n etc.
BUT, as you are totally right, there is a bug in the countdown display which is initialised at 24h after the second submission in a 24h window, when it should be initialised at (24-n)h in our example. But this should not prevent you from resubmitting at H=24: a few moments before H=24, the countdown will still show n hours remaining but then at H=24 exactly it will vanish and you will be able to resubmit. We understand this bug may be misleading and it will be corrected in the v2 of the Challenge Data platform which will be available next season.
We hope you will still be able to enjoy our challenges!
The Challenge Data team