JabRef version JabRef 5.3--2021-05-24--59fb185

• Mandatory: I have tested the latest development version from http://builds.jabref.org/main and the problem persists

• Create Smith2x.bib with two entries with (author year title)

  • Smith 2000 Alpha
  • Smith 2000 Beta

• Start a new document

• Cite each above, individually, in reverse order.

• Choose Default Author-year style

• Refresh (generate bibliography)

Both statements below are true

• The bibliography is sorted in (author, year, title) order
• The letters (in 2000a, 2000b, 2000c) are assigned in order of appearance

The problem: now 2000b precedes 2000a in the bibliography.

Probably the bibliography should use (author, year, uniqueLetter, title) order