Having the year as a toplevel sorting criterium is a little bit unorthodox and confusing. Use author names instead.
@@ -153,7 +153,7 @@ if (isset($options["--cv"]))
During my thesis, I contributed to <?php echo $num_publications ?> publications in conference proceedings, <?php echo $num_publications_in_thesis ?> of which are included in this thesis as shown below.
-\newrefcontext[sorting=ydnt]
+\newrefcontext[sorting=nty]
<?php echo $sloppy_begin; ?>
Stefan Gast