How do you know the third paragraph doesn't simply list exceptions to the rules in the second? The description is actually somewhat ambiguous; they should have explicitly specified that the creature isn't incapacitated.
It seems pretty clear to me, if native incapacitated. If not native sent to home plane - no mention of incapacitated.
That leads to another related question.
If the target is native to a different plane it returns to it's home plane. If the caster ceases to concentrate on the spell before the minute is up the target returns. So far so good.
But there doesn't seem to be anything stopping the target from plane shifting back to where they were. They just don't automatically return if the concentration is maintained for a minute.
So you banish a demon back to their native plane. They aren't incapacitated, they may or may not return in a minute. So instead of waiting they just plane shift back into the fight.
I see nothing in the text that says they cannot return, although I believe in previous editions it was something like a year before they could come back. Am I just missing it?