It's one of those stupid features of Pro/E & Creo that have been there forever. If you have a pattern, and you show the dims, the dim will always show up on the second feature of the pattern. You have to do like Eric said and actually show it by selecting the hole. Move attach will not work.
Obviously, move attach would be the logical way to do this. But for some reason, PTC hasn't seen fit to fix this.
David Haigh