The admins finally responded after a few days, but by then I had already removed the other user as a mod (the method to do so is a bit hidden).
Currently there are two mods, myself and @absolutebeginner@lemmy.ml who created this community, but has since deleted all their posts and hasn't posted again in years. In order to remove a mod though you need to click into a post they made. With no posts, I can't remove absolutebeginner even if I wanted to.
Awesome, I was hoping you would want to as you are a regular poster. :)