If the gates to the shadow world are not necessarily chronologically matched, does it really
matter when the halflings crossed over from the Shadow world? For that matter in the
shadow world, the battle of Deismaar might not yet have happened. Or the few blooded
halflings exited the shadow world before the battle, and were consequently blooded. (You
can enter and exit but you may be somewhere or somewhen else)

Sigh, chronomancing halflings ;)

"Well, does anyone have any silver?"
from dusk till dawn