System Logs : inconsistent display

SYSTEM INFORMATION
OS type and version Debian Linux 12
Webmin version 2.660

The search results displayed are different from those provided using the command line showed on top of the results field).

Example :
Display


Command line

# journalctl --no-hostname --lines 10000 --unit postfix\@\-\.service --since '7 days ago' --grep "leslab" | awk '{ print $1, $2, $3, "… …" }'
Aug 28 10:03:44 … …
Aug 28 10:02:41 … …
Aug 28 10:02:41 … …
Aug 28 10:01:36 … …
Aug 28 09:56:18 … …
……

With a different filter “since”, results can also be correct :

Logic ?
I tried to find some kind of logic making different tests but my tests where unsuccessful. Sorry.
All I can say is that the default “Latest available” often returns consistent results.

Tell me if you need additional information I could provide you.