Hello,

I'm trying to develop a custom style for the Entomlogical Society of America's journals.
I've hit a problem with multiple citations. The bibliography should be sorted by author then date eg:

Jones 2008 Title. Journal. vol:pages
Smith 2005 Title. Journal. vol:pages

However, mutiple citations should be sorted by date, then author e.g:

(Smith 2005, Jones 2007)

And I can't work out how to make that happen.

I have the following in the citation part of the style sheet:

<citation>
<option name="et-al-min" value="3"/>
<option name="et-al-use-first" value="1"/>
<option name="et-al-subsequent-min" value="3"/>
<option name="et-al-subsequent-use-first" value="1"/>
<option name="disambiguate-add-year-suffix" value="true"/>
<option name="disambiguate-add-names" value="false"/>
<option name="disambiguate-add-givenname" value="false"/>
<option name="collapse" value="year-suffix"/>
<sort>
<key macro="year-date"/>
<key macro="author-short"/>
</sort>
<layout prefix="(" suffix=")" delimiter="; ">
<group delimiter=", ">
<group delimiter=" ">
<text macro="author-short"/>
<text macro="year-date"/>
</group>
<text variable="locator"/>
</group>
</layout>
</citation>

But I still get multiple citations sorted by author. Could someone advise me about what I'm doing wrong here, please?