US Immigration from Kenya

am trying to set up my interview in vain. I have already set up an account on the immigrant? visa portal. However when I emailed the embassy????, ?they sent me a link directing me to the niv portal as the one to set up? my interview. I am very confused. Am I supposed to ?add other applicants ( my kids) on the niv portal as I did with the? ?IV?. Below is what I am getting on both portals

I changed my last name from my maiden name. (I am the beneficiary) I now have a new passport and documents have my new name. Is it necessary to notify the uscis about it or they will change it during my interview?

Anyone else who filed in September 2018 and how far are you,?

My priority date is 09/25/2018

Folks I want to share how USCIS Ombudsman helped me with getting my green card resend to me by USCIS after waiting since March,2018.I filled the Case assistance form online( DHS-7001) & attached confirmation page of payment,my expired immigrant visa stamped on my passport,the infopass confirmation letter.I filled on Nov 1 & by Nov 9 USCIS mailed my green card after being contacted by Ombudsman on Nov 7.It arrived Nov 13 because of the Veteran holiday on the 12th & this time It was brought to my door & required my signature.So those with a Similar problem you should try this because they kept me updated to the end.Good luck.

I just applied AOS on October 6th, NOA date was 10/12/2018,,after a week I received 2nd NOA 10/19/2018, for my bio app on 11/09/2018.

I think this is moving pretty fast or it depends on the field office?