Multiple authors: Mess in bibliography

EndNote EndNote How To
2

You need to be sure to enter each author on a separate line in EndNote.

If you have them all typed in on one line that will cause the issue.

Please see the Knowledge Base article

https://support.clarivate.com/Endnote/s/article/EndNote-Records-with-more-than-one-author-do-not-show-properly-when-formatted?language=en_US