The 'Last revision" filter group is meant to be a total-coverage group. But the name of the filter that is not "Last revision"—"Earlier revisions"—is inaccurate and potentially confusing, since this filter actually picks up everything that's not a Last Revision, including Logged actions such as user registrations, etc.
Please change the name of this filter so that the set reads as follows:
Only the most recent change to a page.
Not the latest revision
All changes that are not the "Latest revision."