Different list addresses? (was: About GIT and committing submissions)

From: Felix Palmen <felix_at_palmen-it.de>
Date: Sat, 16 Oct 2021 12:49:59 UTC
Unrelated side note: The mail I was replying to had no Mail-Followup-To
header, but it had these:

List-Id: Porting software to FreeBSD <freebsd-ports.freebsd.org>
List-Post: <mailto:ports@freebsd.org>

It seems this caused my MUA (neomutt) to direct the followup to *both*
addresses. Is there a problem with the mailing-list software? Or is it
neomutt doing something wrong? Unfortunately, I didn't catch this before
sending, so there's now a double post :/

 Dipl.-Inform. Felix Palmen  <felix@palmen-it.de>   ,.//..........
 {web}  http://palmen-it.de  {jabber} [see email]   ,//palmen-it.de
 {pgp public key}     http://palmen-it.de/pub.txt   //   """""""""""
 {pgp fingerprint} A891 3D55 5F2E 3A74 3965 B997 3EF2 8B0A BC02 DA2A