Thank you for your response and diagnosis. I have used this procedure before on another paper and will go through it again tomorrow with this currently corrupted paper.
Do you have any ideas about why I am regularly (second time) having this problem with corrupted EndNote codes? Could it be because I sometimes (accidentally) erase a citation by backspacing over it, rather than using the “Remove” function for editing citiations?
When you say you share your docs with CWYW off, do you mean with Instant Formatting turned off? This sounds great, because then I guess I could just turn it on again. But what if a reviewer adds a track changes code to a ctiation? For example, changes the spelling of an author name from “Cop, 2011” to “Coop, 2001?” Then, when I turn on CWYW again, couldn’t this possibly lead to the corruption problem?
I have followed all the steps you mention and it is definitely not working for me.
My problem is not during the citation within the next, but rather in the reference list. So, the reference list gets duplicated everytime I add a new reference to the text.