At the time of writing, https://www.wikidata.org/wiki/Q23015723 has two values for Property 496 (ORCID iD). One is ranked as "preferred", the other "deprecated", but the deprecated item is listed first.

The order in which multiple values for a property are listed should be first "preferred", then "normal", and finally "deprecated".

Where the ranks are equal, values with references should be listed before those without.