9.17.3 Can you answer these questions?

9.17.3.1 Side margins right and left are not equal

https://tex.stackexchange.com/landing/r/digest?cta=question&id=678686

Please look at my MWE. I would expect odd and even side margins being the same but they are not. What I am doing that is wrong? 
(I added most of my preamble just in case it matters...) 
Thanks. 
\... 
[margins]
 

asked by Haim https://tex.stackexchange.com/landing/r/digest?cta=user&id=254618 Score of 1

9.17.3.2 Add a vertical line centered inside a framebox

https://tex.stackexchange.com/landing/r/digest?cta=question&id=679196

I would like to have a vertical line inside my framebox. So my framebox should be divided into two equal halves. I haven't found anything about it in the forum yet. Here is a code snippet. 
\... 
[vertical-alignment] [boxes] [framed]
 

asked by wayne https://tex.stackexchange.com/landing/r/digest?cta=user&id=178154 Score of 1

9.17.3.3 bib references appear ending with a comma

https://tex.stackexchange.com/landing/r/digest?cta=question&id=679278

I'm citing these references from Google Scholar, but why is the format wrong, ending with a comma instead of a period, does anyone know how to fix it? 
@inproceedings{garcia2018few, 
title={Few-shot ... 
[biblatex]
 

asked by Leshui https://tex.stackexchange.com/landing/r/digest?cta=user&id=283193 Score of 1

answered by Leshui https://tex.stackexchange.com/landing/r/digest?cta=user&id=283193 Score of 0