I just received this reply from support:
Hello,
Thanks for replying. There will be a fix released within the next two days that should hopefully resolve this issue. The previous ranking system will be restored and affected story ranks should normalize by mid-week. Please let me know if you are still experiencing this issue by the end of this week, or if you have any additional questions.
We would like to thank you very much for being a member of the Episode community, and we sincerely apologize once again for any inconvenience this has caused.