Think they're arranged by last post By default. They probably should just stick in the order they're stuck though. Feature request maybe.
I think it needs to be changed by admin on settings.
Sitemap restrictions don't allow for too-large sitemaps. We break the sitemap up into sections (1, 2, 3, etc.).
That link! Srly! Do you want to send traffic to that site???
Updated link to me more family friendly