What happened to the time limit? (spoilers)

Heavy, heavy spoilers for episode 12 ahead.

So if I remember correctly, a couple episodes ago the portal to the demon world was starting to close (in like a week's time too), and that's what started the big rush for a philosopher's stone. Rather than cause a war or robbery of the other stone, Leo offered the one in his chest (blah blah blah you've watched the show) and lowkey leads to the big fight over his life.

But when he joins the demon army at the end, everyone seems overwhelmingly happy-go-lucky and relaxed and it seems this threat has completely disappeared.

Have I genuinely forgotten something about the plot here, or was this a plot hole, or maybe just a confusing change of mood?

mkzxwing said:
The writer and show's trash, why do you expect it to be consistent and make sense