Is there a way to properly sync the changes in EndNote Library to ALL citations in my Word document?

Hi!

I have been really struggling with this one to a point that it has become so frustrating. 

I am working on Word (Office 365) on Mac OS Mojave. In my in-text citations, I need to have only one author name. Therefore if there is more than than 1, then it will all be cited as ‘et al.’ It seemed easy enough initially as I edited from the APA 6th Style. I have changed in Endnote Desktop > Edit > Ouput Styles > Edit “APA 6th Style”. In the reference output description, I have changed Citations > Author Lists> Abbreviated Author List - First Appearance > ‘If 1 or more authors, list the first 1 author(s)’… Despite changing this, and ensuring that the output format in Word is the same, there are some in-text citations that still lost 2-3 authors’ names. 

I have tried reformatting the references. Word > Endnote> Tools > Convert to Unformatted Citations. Then reformatting it again. I have tried this several times. But there are some really stubborn references which just dont want to change. 

Please help!

Thank you