citation problem - same author and same year but different article

I wanted to have citation looks like this:

Paragprah one: (Freeman 1984a). Second paragraph: (Freeman 1984b). For some reason, it kept showing 1984b in the first paragraph and 1984a in the second. I have tried to delete everything and key in again, but it showed the same. I wanted to have the right sequence. What should I do?

Ordering in citations - is dictated by the output style and publishers criteria.  It is usual that this is defined by the alphabetization of the citation according to some rules according to how it ends up in the references cited list at the end, and not to the order cited in the text.  See herefor a lengthy discussion including some trick to circumvent the issue (albeit - you won’t be following the publishers requirements).