Er, I think it picks up the threads you posted to, then groups them, and sorts them into the date-last-posted to order. If it kept the dates of the individual posts I think you would find a given thread might appear many times.
# MUSHclient: General: Changing Font causes Crash Thu 18 Mar 2004 03:49 PM
# MUSHclient: Suggestions: Scripting/Triggers Tue 16 Mar 2004 06:54 AM
# MUSHclient: Suggestions: MC Minimize to Tray option Sat 15 May 2004 03:43 AM
# ROM: Running the server: Copyover crashes after recovery Thu 26 Feb 2004 06:21 AM
# Forum - how to use it: Problems: Incorrect timestamps Wed 28 Jan 2004 12:35 PM
The problem is the "MC Minimize to Tray option" timestamp. It seems to pick up the last post in that thread, instead of the last post in that thread by _me_, making it out of chronological sequence.
The dates and times for posts above are shown in Universal Co-ordinated Time (UTC).
To show them in your local time you can join the forum, and then set the 'time correction' field in your profile to the number of hours difference between your location and UTC time.