I need your help guys

Preparing ILR (SET-M) application is not easy.
I’m stocked at Section 10 (Evidence of Cohabitation)
“6 letters and/or others documents addressed to you and your partner at the same address“.

A). Is it valid if “MRS & MR P. SMITH“?

B). My name in our power bill is wrong spelling.
Supposed to be “Nancy Smith” but it was “Namsy Smith“.
Is it alright?

C). Most of our letters were “Mr P. & Mrs N. Smith”
Were this documents valid?

I am worried because of my experience in the Philippines,
I had trouble processing papers when my first husband died. “My youngest son’s name was miss spelt by one letter.”

D). Lastly,
In these 6 letters, is the date necessary? For instance,
two electric bills (June & July 2008), 2 telephone bills (April May 2009) & 2 letters from a friend (Nov, & Dec. 2007) Is this alright?

I’m really confused. Please do help me