Digimon Savers / Digimon Data Squad

[floramon]

I watched last ep. I have questions.

Agumon said, "The portal is closed. There will be no more wild Digimon coming and I will be useless here...blah...blah..."

Ok, when the portal is closed, no more wild Digimon coming to Earth?

Back to episode 1:
I believe the portal is closed, right?
If it is closed, why still got wild Digimon coming to Earth?

In last episode, when captain said they wanted to close the portal forever (they didn't know how long it will be closed), the Earth is saved coz no more wild Digimon coming. How did they close the portal? How sure were they?

But why they didn't close it 'properly' in episode 1 so that no wild Digimon can come? I mean, if they closed the portal in episode 1 as secure as episode 48, there will be no wild Digimon coming to Earth in episode 1, right?

In the first place (episode 1), why they didn't destroy or close the portal forever? Why they decided to close it forever in last episode? If they closed it forever in episode 1, there will be no more battles in the following episodes.

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This reminds me of Digimon season 1:
Gennai said he would seal the Digimon portal. (last episode)

But in Digimon season 2, Ken opened it easily.

Captain said the portal is closed. I believe someone will open it again in season 6.