I'm afraid I can't answer your first question as I don't know what it is you saw.
As for your other question, my answer would have to be, I simply don't know. We dealt with Lucifer and put an end to the apocalypse. Had you arrived during that I'd say you were brought here to fight. But since it's ended, I really don't know why the Seal continues to take and bring more and more people to and from here.