Q:

Biblatex puts authors names after an article name if the number of authors is more than 3

If the number of authors is more than 3, biblatex puts authors names after an article like this

Although it should leave the names before the title of the article.
Biblatex settings:
\usepackage[backend=biber,bibencoding=utf8,sorting=nyt,maxcitenames=2,maxbibnames=999,style=gost-authoryear,language=auto,autolang=other,uniquename=false]{biblatex}

A:

This is a specific feature of biblatex-gost styles, which implement the requirements of the Russian bibliography standard ГОСТ 7.0.5—2008, so I assume this behaviour is wanted.
The styles support the option movenames=false, to stop moving names to after the title. Unfortunately, I don't read Russian very well, but the documentation of the style has some more details about the option that may interest you.
\documentclass[british]{article}
\usepackage[T1]{fontenc}
\usepackage[utf8]{inputenc}
\usepackage{babel}
\usepackage{csquotes}

\usepackage[backend=biber, style=gost-authoryear,
  maxcitenames=2, maxbibnames=999, movenames=false]{biblatex}

\addbibresource{biblatex-examples.bib}

\begin{document}
\cite{sigfridsson,herrmann}
\printbibliography
\end{document}

