I am using endnote X7 in word. There is a reoccuring problem when I cite an article. When I implement the new citation it is added to the citation list at the bottom of the manuscript (as it should be) and then, for some reason, it copies all the previous existing citations of the manuscript and adds it once again to the manuscript. So the whole citation list basically copying itself and by that doubling each time I implement a new citation (or delete a citation , it does not matter). This is somewhat time consuming, especially if your citation list is rather long. Can anyone help?