You want to make sure your style citation author settings are as in the attached image. Make sure there is a space before and after the & in both places. And make sure the number 3 is in both places. That way two authors will be listed, but 3 or more will end up as 1st author et al., which I htink is what you want.
wow I did it. its working as i want now. The problem is not in the Author lists, but how i typed author’s names in the reference field.
I shouldnt type the authors’ names in one line, they should be seperated by [enter] and also the ‘secondary author’ needs to be added in the citation templates
There is no need for the secondary author in the templates. The secondary author would be, for example, the editors in a book chapter. They are not the “second” author in the list.