citation of a crossrefed element appears next to the crossreferencing element and is not sorted alphabetically

[stefan11]

There are two references to Curry in lfg-include.tex. The item cross referenced by the first reference appears between them.

[Glottotopia]

"Louvain-la-Neuve" with capitals. Delete "Belgium". We do not write "Paris, France". Probably, both items are \cited separately. Note that we never output "... propositional algebra. In de Groote (1995)".

[stefan11]

MWE:

    \documentclass{article}

    %\newcommand{\bibstylepath}{/Users/stefan/Library/texmf/tex/latex/unified-biblatex/}

    \begin{filecontents}{ref.bib}
    @book{degroote2000a,
            Address = {Louvain-la-neuve, Belgium},
            Editor = {de Groote, Philippe},
            Publisher = {Academia},
            Series = {Cahiers du Centre de Logique},
            number = 8,
            Title = {Test item The {Curry-Howard} Isomorphism},
            Year = 2000}

    @incollection{curry;feys95,
            Author = {Haskell B. Curry and Robert Feys},
            Booktitle = {The {Curry-Howard} Isomorphism},
            Crossref = {degroote95a},
            Key = {curry-howard isomorphism, logic, type theory},
            Pages = {9--13},
            Title = {The Basic Theory of Functionality. Analogies with Propositional Algebra}}

    @book{degroote95a,
            Address = {Louvain-la-neuve, Belgium},
            Annote = {13.7.03},
            Editor = {de Groote, Philippe},
            Key = {curry-howard isomorphism, logic, type theory},
            Publisher = {Academia},
            Series = {Cahiers du Centre de Logique},
            number = 8,
            Title = {The {Curry-Howard} Isomorphism},
            Year = 1995}

    @book{curry;feys58,
            Address = {Amsterdam},
            Author = {Haskell B. Curry and Robert Feys},
            Key = {curry-howard isomorphism, type theory, logic},
            Publisher = {North-Holland},
            Title = {Combinatory Logic},
            Volume = 1,
            Year = 1958}
    \end{filecontents}

    \usepackage[
    %   natbib=true,
    %   style=\bibstylepath langsci-unified,
    %   citestyle=\bibstylepath langsci-unified,
            style=authoryear,
            backend=biber,
    ]{biblatex}
    \addbibresource{ref.bib}

    \begin{document}
    \nocite{*}
    \printbibliography
    \end{document}