The problem is solved. The style displays all authors for the initial citation and switches to "et al." for subsequent citations. Now to figure out how to prevent this from happening.
Update:
The fix is to add \citationmode{abbr}. I got this from the harvard manual.
I'm trying to use a custom-bib bibliography style but it looks like the generated citation style is not being applied to the in-body citations.
I want in-text citations with three or more authors to use "et al." after the first author for papers with three or more authors. Ex I want [Brockfeld ...