I have a pandoc-style Markdown text where I cite two papers by the same author in the same place:
Lorem ipsum [@Author2000;@Author2001] dolor sit amet.
In-text citation formatting is defined by your CSL between
tags. The sorting of your citations is defined between the
tags. The CSL you are using sorts by author and then by descending date issued - (Author 2001, 2000):
...
To sort by author and then by ascending date issued - (Author 2000, 2001):
...
To not sort the citations, just remove everything between the
tags.
...