Thanks so much TarlarAustralia that's really helpfulThe Answer to both Questions is no. The processing officer is the person to checks it's a valid application etc, this wont be your Case Officer.
The HAP ID is just information for you, I wouldn't do the checks just yet, perhaps wait about 6 months. I got exactly the same information in the email when I applied and my 820 still took 13 months.
Good luck, happy waiting!