1795/6 was changed by Barnabas (and Eve?) before the 1897 storyline.
Re buzz-- The "divergent time line" thing sounds like a science-fiction idea being imported to DS which doesn't relate to the way they dealt with time in DS. I may be taking an offhand remark too seriously, though. Anyway, in RT there is only one timeline and in PT there is only one timeline (both separate, unconnected), though each one can be rewritten. If you prevent an event in history from ever having happened, then it never happened. It isn't still some real event in another existence that's out there, somewhere.... DS didn't have that infinite-number-of-parallel-universes-where-every-choice-is-played-out thing.