Re: Using Sticky Post
There are two types of stickies: you can stick a post to the top of its particular forum, and you can stick a post to the top of all the forums.
For example, say you have a bbPress install with one forum: Forum A.
* If you sticky a post in Forum A, the sticky post will appear at the top of boards.domain.com/forum/ForumA (but not at the top of boards.domain.com).
* If you “stick to front” that same post, it will appear at the top of boards.domain.com (but not at boards.domain.com/forum/ForumA)
From what you described, I’m guess the post has been stuck to the frontpage and not to the forum. Unstick it and then re-stick it but this time not to front.
Hope that helps!