Sadly, this doesn't really solve my issue. You can add milliseconds to the timestamp in the neo-logging.xml file, and it does write the additional data to the log files, but that also makes the files unreadable by the CF Admin (you get an invalid date/time format error). So unless I wanted to forgo the CF Admin, this doesn't work.
I noticed that before making that change, the entries in the log files do have the second stamp, and while the CF Admin does seem to separate the entries by seconds, it does not display them in the same order they are in the file. So I guess it's really just a flaw/oversight in the way the CF Admin log display is written where it reads the file contents and then re-orders them arbitrarily rather than simply following the order provided by the file. Guess I'll have to make my own log display template.
