Yes. I mixed up the two suttas. Corrected it. Thank you!
Yes. Both explanations hold.
– Attachment to them sustain the rebirth process. Losing attachment to them (with the correct seeing of the true nature) leads to stopping their arising, i.e., Nibbana.
Yes. The Buddha described “loka” in several ways: six dhatu, five aggregates, 12 ayatana, etc.
No errors. Very good. This is real insight mediation!