There is no need to bump your post in this board, bumping is only allowed when a post falls off the first page of the board it is in, which in this board takes days ^^
There isn't any way to curate the 'My Posts' page, its actually just a custom forum search of your posts, sorted by threads. Your posts would have to be deleted from the topics to remove them, which in most cases users cannot do themselves. If you would like a list of threads you can curate, I suggest using the
Bookmarks page, you can add any thread you like to your bookmarks without needing to post on it, and remove them anytime you want. You can add threads by scrolling to the bottom of the thread and there will be a 'Bookmark topic' link on the bar under the thread, just click that to add it to your bookmarks.