I like the auto-bumping when I am using the "hot" sorting option, provided the bumps are for posts that are actually hot. I have noticed that the sort appears to be point-in-time and any new post is bumping.
I cannot figure out how to prevent this from happening. If I view "top day" I initially see all the top posts of the day, but then still see new posts bumping my feed.
Yep, that matches my experience. Glad to see it's already been mentioned. Thanks