Hello Femto,
Back in July, 2016, we made changes to the Quantopian Open rules that were set to take effect as of contest 20 (August, 2016). This required community members to submit new contest entries, while keeping old submissions qualified only for the on-going contests at the time (up to contest 19). You can read more about it in this announcement we made to the community.
EDIT 1:46pm ET: While your contest submissions were disqualified, the corresponding paper trading algorithms will still be active and running if you accessed them during the last 30 days. You should still be able to keep track of their performance through their live trading dashboards. To submit them to the current contest without loosing their track record, you can make copies and submit the copies to the contest.
Sorry for the inconvenience, I hope this helps clarify things.
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