That would be yesterday's date :-) The date shown is the date the script is run (the post date).
If you want to limit the number of articles (I think this is what you mean), you'll have to hack the source and add in a counter somewhere in or around the loop if ($jitemheadline != "") { }. Or you may be able to specify the number of articles you want from moreover somehow (can't remember if there's an option or not, check
http://w.moreover.com/dev/).
John.
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