Answering Christianity Research Center

Assalamu alaikum!

I have been reading up on some of the Quranic mathematical miracle.
Now while online, i found this contention that the numbering of verses in the Quran was not something establiahed during the time of the prophet Muhammad (pbuh), and it came later with disputes which made some say the numbers of verses were 6200 instead of 6326 (pretty aure this is it haha) and so the supposwd miracle of the number of chapter and verses being divisblw by 19 and sucj is invalid.
(i believe wikiislam is the originator of this, although i found the exact same thing on a blog post).
Now i may present the argument wrong or poorly
I can link the article or paste it if the need arises or someone asks, but for now could someone take a look haha.

Assalamu alaikum.
I have a question on inheritance in the Quran (this might have been dealth with but just give me a link to the answer than)
Lets say i have: 2 alive parents, 3 daugthers, and a wife. now surah 4:11 and 4:12 say that my wife is to get 1/8, daugthers get 2/3 to share, and my dad and mom get 1/6 each
1/8=3/24
2/3=16/24
1/6=4/24
1/6=4/24

and all that equals in all 27/24... Is that a mathemathical error? I found this on facebook (someone had written this and im just wondering  ) Any help would be appreciated.

I have a few questions on this topic.
first one being: where do we get the criteria from?

(i just wanna clear some stuff up)

I just wanna say hello and that i am a new member on this forum which ive gone through and im lovin it :D but i got some questions about some stuff or rather need some refutations haha and i hope you can help me out here and may Allah reward you for it!