I noticed while making the series of entries about my train trip earlier today that the time stamps didn't seem right. Investigating between stops, I discovered that my LJ settings had me in the Central time zone. I think I may have set myself to Central when I went to Chicago a few weeks ago and never remembered to set it back. That means the past few weeks' entries have been two hours post-dated.
In this afternoon's messages, the times in the texts of the messages are correct; the time stamps are more doubtful.