You are allowed to make changes to your content as long as you are a leader or council of the coven you are in (which is needed to edit spells & articles). Publishers and editors have to approve the edit. While they might be busy, I am sure that they won't hesitate to read a message about updating something on the website. Please note that this is not possible with forum threads.
Given this was brought up. I'm the priestess of our coven and I tried to make a few changes and got no where either. I had been able to completely take something out, but I can't as of my last attempt. I think it said waiting approval.