sorting issue biblatex

Question

I am using biblatex and I add the resources file

\addbibresource{some_refs.bib}

I have an issue when two authors published together in the XXth and in the XXIth : in the references, $XY14$ is sorted before $XY90$

@book{XY90,
    author={X_name and Y_name},
    title={Some title 1},
    year={1990}
    }
        
@article{XY14,
    author={X_name and Y_name},
    title={Some title 2},
    year={2014}
    }

how can I fix this ?

Here is an MWE

Among my references, I have

@book{KS90,
        author={Kashiwara, Masaki and Schapira, Pierre},
        title={Sheaves on manifolds},
        year={1990},
        series={Grundlehren der Mathematischen Wissenschaften},
        volume={292},
        publisher={Springer-Verlag, Berlin},
        pages={x+512}
    }
    
    @book{KS96,
        author={Kashiwara, Masaki and Schapira, Pierre},
        title={Moderate and formal cohomology associated with constructible sheaves},
        year={1996},
        publisher={Citeseer}
    }

    @article{KS97,
        author={Kashiwara, Masaki and Schapira, Pierre},
        title={Integral transforms with exponential kernels and Laplace transform},
        year={1997},
        journal={Journal of the American Mathematical Society},
        volume={10},
        number={4},
        pages={939--972}
    }

    @article{KS14,
        author={Kashiwara, Masaki and Schapira, Pierre},
        title={Microlocal Euler classes and Hochschild homology},
        year={2014},
        journal={J. Inst. Math. Jussieu},
        volume={13},
        publisher={Cambridge University Press},
        pages={487--516}
    }

my latex file

\documentclass[12pt,leqno]{book}
\usepackage{amssymb,amsmath,amsthm}
\usepackage[backend=bibtex,style=alphabetic]{biblatex}

\addbibresource{some_file.bib}


\begin{document}
    
\cite{KS14}

\cite{KS96}

\cite{KS90}

\cite{KS97}
\printbibliography[heading=bibintoc,title={References}]

\end{document}

And I get as an output KS14 showing up before KS90, KS96, KS97

Answer 1

By default style=alphabetic, sorts bibliography entries with sorting=anyt, which sorts primarily by the generated label. Since "KS14" comes before "KS90" if you sort it alphanumerically you get the output you see.

One way to get the desired sorting would be to force sorting=nyt. Then your entries get sorted by name and (complete) year.

\documentclass{article}
\usepackage[backend=bibtex,style=alphabetic,sorting=nyt]{biblatex}

\begin{filecontents}{\jobname.bib}
@book{KS90,
  author    = {Kashiwara, Masaki and Schapira, Pierre},
  title     = {Sheaves on manifolds},
  year      = {1990},
  series    = {Grundlehren der Mathematischen Wissenschaften},
  volume    = {292},
  publisher = {Springer-Verlag, Berlin},
  pages     = {x+512}
}
@book{KS96,
  author    = {Kashiwara, Masaki and Schapira, Pierre},
  title     = {Moderate and formal cohomology associated with constructible sheaves},
  year      = {1996},
  publisher = {Citeseer}
}
@article{KS97,
  author  = {Kashiwara, Masaki and Schapira, Pierre},
  title   = {Integral transforms with exponential kernels
             and {Laplace} transform},
  year    = {1997},
  journal = {Journal of the American Mathematical Society},
  volume  = {10},
  number  = {4},
  pages   = {939--972}
}
@article{KS14,
  author    = {Kashiwara, Masaki and Schapira, Pierre},
  title     = {Microlocal {Euler} classes and {Hochschild} homology},
  year      = {2014},
  journal   = {J. Inst. Math. Jussieu},
  volume    = {13},
  publisher = {Cambridge University Press},
  pages     = {487--516}
}
\end{filecontents}
\addbibresource{\jobname.bib}


\begin{document}
\autocite{KS14,KS96,KS90,KS97}
\printbibliography[heading=bibintoc,title={References}]
\end{document}