When you do a search the similar news stories are automatically grouped so that you won’t have to read the same one several times. For more information on this feature, see this article.
When you create portlets on a dashboard displaying DCF results or alerts from agents, deduplication is automatically activated. However, on occasions you may need to check a few things to make sure this feature works properly.
First of all, in order for the duplicates to be removed, you need to make sure that only one agent is displayed in this portlet. Depuplication will not function if the same alert has been found by two agents.
Then look in the options of your portlet to check that option to display the duplicates is unchecked. To do this, open the advanced options of your portlet.
You will now find that duplicates of the same news story will be grouped.