Dimensional Split (Timing of)

Inquiry

In Viper Manor, Belthasar declares that the split of the dimensions happened ten years ago.

Prophet:
   Serge... This world is not
   the world you grew up in.
   10 years ago, something
   happened that put your very
   soul teetering on the
   balancing scales of fate...
   with a fifty-fifty chance
   of life or death!
   This is when your future
   was split in twain.

Prophet:
   In your home world, you
   survived to live a happy
   and prosperous life.
   That is how you made it to
   the present point in time.
   However, here in this
   '"alternate"' world,
   you are, in fact,
   very dead and buried.
   You died 10 years ago, but
   this world's time line has
   flowed on regardless.
   You have no place in this world...
   Here, you are but a ghost
   brought back from the past!

Prophet:
   I do not know what
   happened 10 years ago...
   Nor can I guess what
   triggered your entrance
   into this world.

Later, Lucca alleges that it occurred in 1006 A.D. when Serge was injured and Schala reached out across time.

As Schala fell through the
   time gate in this condition,
   she heard your crying
   echoing through time...
   That is when her story and
   yours began to intertwine...
   It is also when the past and
   the future began to intersect,
   and when the world became
   divided into two...
   Led by the pitiful crying
   the young Serge made as
   the panther demon's poison
   took hold of him...
   Princess Schala traveled ten
   thousand years in time to try
   and make contact with this
   dimension!

Which account is correct? Is Belthasar lying? He obviously is faking it when he notes that he does not know what happened ten years ago; could he be misguiding Serge in preparation for the real truth as delivered by Lucca? Did it happen even earlier?

Discussion

The 1010 A.D. timing was originally chosen by the Chrono Compendium for simplicity. This is when Kid rescues Serge from Lynx and his life truly diverges from the past.

Also, we know that Kid is sent to the world by Schala as her mind tottered on the brink of being completely consumed by hatred. If the split occurred before 1004 A.D., two Darkness Beyond Times would have to exist for two copies of Kid to be sent to each dimension. This is a strange and troubling possibility, and this would mean there are two Time Devourers (with only one defeated), something we know to be false by ostensible game presentation at the nature of Time Error regions. However, this problem does not occur if it happens after 1004 A.D. If the split is truly retroactive (going backward as well as forward), problems for Chronopolis arise as well. Chronopolis came from a future in which the split hadn't happened; if it traveled back in time to 12000 B.C. with two dimensions, one of them (presumably Home) would never receive Chronopolis, and we know this to be false.