So I put up a raffle yesterday with no predetermined length that I was going to end manually on Friday, but when I logged in today, I got a message that the raffle had ended already. I know I must have made a mistake somewhere - perhaps it ended when I logged off - but I'm not sure what I did wrong.

Does anyone know the problem? I'm not annoyed or anything, I just wanted to allow more people to get a ticket since it was free.