To add what Michel is saying, when you first log in, the top frame will show all the messages that have occured since you logged out. If you manually refresh, the top frame won't contain those messages any more...it will only contain the messages that occurred since you logged in (or since the previous refresh).

>It seems to me that my setup (or whatever) is "picking" up messages posted during the past some many hours/minutes from the current time. Is there a setting I can change?
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>TIA.