@plottwist I'll have a look at the other timeline in the light of day, it's late here.
As for the aforementioned one, it contains dates/ titles of the non-canon entries only. It gives no information on them precisely because they're non-canon and therefore their events have no influence on the IGA timeline.
They are most likely there because as with CV judgement, IGA still notes their presence as existing - as parallel events to the actual timeline = his timeline (see this timeline as I've laid it out in my signature).
Further evidence to this is the information given under dates 1897 and 1999; both canon occurrences of the Castlevania universe which are crucial to the storyline and chronology. Although there is no Belmont/ Morris portrait, information pertaining to the sequence of events is gone into in detail.