When I clone a contest from vjudge and try to set a replay contest, it always shows that the begin time of the contest must be prior to begin time of original contest, and when I set new contest as replay contest, it shows the end time must be prior to begin time. So when I set a replay contest, it finishes immediately.

And about ranklist xls file, I've no idea how to create one, I created like this and it as accepted.

Update: Solved https://www.youtube.com/watch?v=MkjIG7cbp5M