It probably couldn't hurt to start a discussion. I wouldn't see this as a big deal, except that the  template doesn't do the best job of explaining what its classification of the article means. As far as I can see, the template refers only to the position of the article link on the WP:GA page, and this is not a formal declaration of exactly where the article fits within the organization of all human knowledge. However, we might as well try to put the peak oil article link in the GA page location that makes the most sense.