Yes, I've read this question. I thought I already knew the answer:
- activity is most recent activity (answers, comments, edits)
- newest is ordered by when the question was asked
And the comment on that answer seems to verify that information. Another older Meta.SE question is similar (although the "recent" filter changed to "activity"), and the answer makes sense. However, that's not what I'm seeing in my profile.
Activity seems to only track new answers, edits to answers, and maybe something else? In any case, it makes sense and is ordered properly.
Newest seems to track edits to the Q/A, new answers, but not comments (maybe??). The weird thing is, it's not even sorted in order! The "newest" filter, I would assume, is the
created_at timestamp for the question, and nothing else. But that's not the case, and it's not even sorted chronologically. See the image below from my Stack Overflow profile:
So, in essence, "newest" seems to be completely broken, or I just have a horrible misunderstanding of how it's supposed to function. But it doesn't seem like it should function like this... they should at least be sorted in chronological order. What the heck is going on here?
PS - I tagged this as [bug] because I think it actually might be a bug.