Revision list show only one revision for this question.
But responses list in my profile says there is two with duplicate contents.
That could be a bug in responses list page?
These aren't the droids you're looking for....
It was a non-distinct bug in how we fetch revisions overall, which should have excluded 5 minute edits. This is now the case, only the latest edit/comment from a 5 minute window will be shown (as it already is everywhere else).