Backdating LCWRA

Hi
Little bit confused how backdating a lcwra payment works on universal credit. I initially applied for UC on 07/10/18 - at the time having no idea you could apply and be disabled at the same time (i thought my claim would be denied if i stated i wouldn't be able to work). 
Eventually I had my first ID appointment at the job centre this was on 07/11/18. I explained that I did have a disability that would effect me looking for work/working and was told to bring in a sick note at my appointment a week later.
So a week later on 13/11/18 I brought in my sick note and explained to my work coach i didnt know i could declare my disability and my work coach changed my details on the system so on my journal there's an entry where it says "report a health change". When i click on this entry it says 

"Health change

Effective from: 7 October 2018

*my full name* has a health condition which restricts their ability to take up or look for work"

Does this mean that if my LCWRA is backdated they're acknowledging my illness was recorded from 7/10/18? Or from 13/10/18 when I had my first appointment?

Because of the assesment period dates I have for UC the difference in dates means i either get nothing backdated or 2 months backdated so is quite a big difference!