It works fine and it can also be done a number of other ways too. Each time I get only 3 posts in my listing instead of the 5 wich are specified in the settings of the blog template. (I have a number of 7 articles from wich 2 are from the exculsion topic)
It seems that the 'content in contents' with the condition removes the requested topic, but never goes on the next page in order to get the rest of articles in order to replace the one wich were excluded.
Thank you for your reply. Sorry for the late reply.
I found a work around to my problem. I'm searching the missing articles on page number 2 and loading them on the first page in AJAX. It's pretty complicated dew to the fact that the same loop which generates the listing of articles is the loop which generates the categories listing, author listing and search results listing.