For our needs, we wanted to display in Title order, I modified the stored procedure 'dbo.dnnAnnouncements_GetCurrent. The last line reads:
order by dbo.Announcements.ViewOrder asc, dbo.Announcements.PublishDate desc
You could change this to:
order by dbo.Announcements.ViewOrder asc, dbo.Announcements.PublishDate
Should accomplish what your asking.