Well, I don't have an answer to the first question for sure, but it's probably the same answer for your second question. Polaris is the first world installment in the third arc of the game, and an arc of Wizard101 usually expands over several worlds. The developers at Kingsisle left these important ends loose so that they can further expand the game.
Thank you, whatever you did, i am finally free of her, i still see her standing at the openings of caves, so you might want to look into that also. Thank you again for your help!!
it a glitch (happen every time enter zone with companion example: Rasputin) they back on side again only get rid of them by pass zone again means: Fight Rasputin again to get rid of companion) but she come back enter Rasputin Boss again (get her back) same thing for the: Jeweled Slopes (don't finish) jeweled slopes example like farming from a boss