Author name and first name order with biblatex [duplicate]

Question

Explanations:

I'm trying to migrate from natbib to biblatex.
I don't know if it's a good idea but according to some links under, it seems like.

Anyway, I'm having some small issues yet:

When there is several authors to some paper, in the References, the first author is written so:

Robert, J.

-> last name first and first letter of first name.
OK. It's what I want.

But then, all other authors are listed so:

J. Haking, and Matthew Haris

so first letter of (or full) first name and then last name.
So it's the inverse as the first author!

Questions:

Question 1: same arrangement in names;

I wonder if it's the normal behavior and how could I have the same arrangement, i.e. Last Name first, and then first letter of first name for every authors listed?

Question 2: get initial of first names;

Is there a way to force an initial-like display for the first name instead of the full first name?
I currently have a disgusting mix of these 2...
Yes, I know, I can (should) make this properly within the *.bib file...
But then, if I write down the full first name in the *.bib file and I would like the abbreviated form in my References, how could I achieve that?

Question 3: same author for 2 papers;

I have once the same author for two different papers. Fine. But the second one is figured out so:

— (2005). "Title" ....

There is a big hyphen instead of the author name. I guess it's because it's already in the reference just above, but I find it ugly.
Again, is this behavior normal and is there a way to force the author name to be written here?

Code:

I'm currently calling biblatex in the preamble like:

% Biblatex bibligraphy:
\usepackage[
backend=bibtex,
style=authoryear,
citestyle=authoryear-comp,
natbib=true,
sorting=nyvt, % https://tex.stackexchange.com/questions/51434/biblatex-citation-order
doi=false,isbn=false,url=false
]
{biblatex}
\setlength\bibitemsep{0.64\baselineskip}
% \bibliography{<mybibfile>}% ONLY selects .bib file; syntax for version <= 1.1b
\addbibresource{biblio.bib}% Syntax for version >= 1.2
%%%%%%%%%%%%%%%%%%%%%%%%

And in the document at the right place where I want the References:

\newpage{}
\markboth{References}{References}
\addcontentsline{toc}{chapter}{References} 
\nocite{*}
% Biblatex bibligraphy:
\printbibliography%[]

Useful links:

bibtex vs. biber and biblatex vs. natbib
What to do to switch to biblatex?
Biblatex citation order

Natbib biblio' styles: https://fr.sharelatex.com/learn/Natbib_bibliography_styles
Natbib citation style: https://fr.sharelatex.com/learn/Natbib_citation_styles
Biblatex biblio' styles: https://fr.sharelatex.com/learn/Biblatex_bibliography_styles
Biblatex citation styles: https://fr.sharelatex.com/learn/Biblatex_citation_styles

Update:

MWE:

test.tex content:

\documentclass[a4paper,12pt,twoside]{report}
\usepackage[utf8]{inputenc}
\usepackage[british,UKenglish,USenglish,english,american]{babel}
\usepackage[T1]{fontenc}
\usepackage[
backend=bibtex,
style=authoryear,
citestyle=authoryear-comp,
natbib=true,
sorting=nyvt,
doi=false,isbn=false,url=false
]
{biblatex}
\setlength\bibitemsep{0.64\baselineskip}
\addbibresource{ref.bib}

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\begin{document}

\newpage{}
\markboth{References}{References}
\addcontentsline{toc}{chapter}{References} 
\nocite{*}
\printbibliography

\end{document} 
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

ref.bib content:

@INPROCEEDINGS{item1,
author={F. LastName1 and G. LastName2 and Haris LastName3},
booktitle={1574 International Conference on LaTeX },
title={Kings in Europe},
year={1574},
pages={2-4},
month={Jun}
},

@inproceedings{item2,
    title       =    "Trees are not animals",
    author      =    "Mike Haking and John Roberts",
    year        =    "1575",
    month       =    "November",
    pages       =    "18--20",
    volume      =    "8",
    booktitle   =    "IEEE International Conference on E-Documents processing",
},

@inproceedings{item3,
    title       =    "Travel through time",
    author      =    "Mike Haking and John Roberts",
    year        =    "2098",
    month       =    "May",
    pages       =    "4--8",
    volume      =    "1",
    booktitle   =    "American Conference on Time Traveling"
}

Results in:

Answer 1

As I found some answers, I post them here:

Answers:

Answers 1: same arrangement in names;

It's the normal behavior for style `authoryear`. To change it, one has to add this line in the preamble after importing `biblatex`:

\DeclareNameAlias{sortname}{family-given}

Answers 2: get initial of first names;

The way to get only initials for first names is to add this in the options [] of `biblatex` when importing it:

firstinits=true,   

Answers 3: same author for 2 papers;

The way to get rid of the hyphen for multiple same authors is to add this in the options [] of `biblatex` when importing it:

dashed=false,   

This results in:

[![output bib][1]][1]

Source:

These tips (as many others) come from: https://tex.stackexchange.com/questions/12806/guidelines-for-customizing-biblatex-styles Thanks to *lockstep*.

Other useful links:

Delete "In:" before journal: https://tex.stackexchange.com/questions/10682/suppress-in-biblatex/10686#10686