Silly me! I found out why it wasn't working properly. I had originally named the wiki 'group 1' and moodle had then assumed that the first wiki page for that wiki would be called 'group'. Then, everytime I typed the word 'group' in my site it thought I was linking to the wiki page. To fix it, I deleted them and named all of my wiki pages something I wasn't going to use in my site - something like 'why we talk (group1)'.