As mentioned above, you should get elite nights credit for II getaways. I have always gotten elite nights credit automatically posted to my account when I have the reservation number attached to my Bonvoy account in advance.
You can do it at check-in, check-out, phone to Marriott, email to Marriott, or the easiest by far is to do it yourself. On your Bonvoy account, go to 'My Trips'. Click on 'Don't see your reservation? Search by confirmation number.' A screen will come up to enter First Name, Last Name, Confirmation Number, and Check-in date. For confirmation number, be sure to use the number listed after 'Reservation Number' on the II confirmation, and NOT the number after 'Confirmation'.
(This method so far has not worked for Sheraton or Westin getaways. Hopefully, it will sometime in the future.)
I believe the 1000 points for II getaways is tier specific. I'm Titanium, so I always get the 1000 points.
Also, I really do not know if you should get elite nights credit for 2 reservations for the same dates.