US Immigration from Nigeria

I currently live in an apartment but my address on my license and for everything else is registered to my parent's address. I do not plan on changing the address to my apartment. Everything I apply for, jobs, insurance, etc. I use my parent's address. But for the spousal application should I use my own address or my parent's address?

Why in the world does USCIS do this. Request the very thing you sent them. Like what in the world.

Also what do you do when they ask for affidavits of explanations why family members (parents, siblings) were not at the wedding) and noratized? How detailed should it be or is something like this below okay.

Dear Sir or Madame:

This letter is written in support of my INSERT RELATIONSHIP with INSERT NAME and HIS OR HER HUSBAND / WIFE, NAME. They live together at INSERT ADDRESS. I have known NAME for (NUMBER) years. On DATE, NAME married HIS/HER fianc NAME in a civil (or religious) ceremony in STATE. (For example, NAMES selected me, to serve as a witness to the marriage OR I know NAMES as they are my neighbors or NAME is my co worker).

INSERT REASON FAMILY DID NOT ATTEND THE WEDDING AND OTHER DETAILS OF HOW THIS PERSON OR FAMILY MEMBER SPENT TIME WITH YOU AND YOUR SPOUSE. THE POINT OF THIS LETTER IS TO SHOW THAT YOU AND YOUR SPOUSE PRESENT YOURSELVES TO FAMILY AND FRIENDS AS A MARRIED COUPLE. EVEN IF THEY WEREN'T AT THE WEDDING.

I support NAME & NAME s marriage and welcome NAME to our family (or friendship).

Signed and certified this _______ of MONTH 2020__:

__________________________________________