Hi Omar,
I received an answer from you in a mail saying :
You may have started the aggregate process too fast, so posts been made at same time, with no way to chck if a post was already made.
What i did is just updating once the concerned blog after adding the feed url, it duplicated the articles the very first time...and i waited few minutes (say 15 minutes ) and tried with another url...
http://actualite-du-jour.bsdemo.com/424165/petite-hausse-et-grande/http://actualite-du-jour.bsdemo.com/424166/petite-hausse-et-grande/You got there many duplicated articles too...i have tried to use rss2sql once, and i had the same issue...the only way to stop duplicate was by making article title as key and make INSERT IGNORE in the query...
Thanks
Yaz