VP:2 questions(((spoliers)))

[Rogue]

theres is some confusing parts in this game like why is arngrim in it?cause it says 100years before the time of lenneth?????that makes no sense plz help?
ok first question
1)Why are some of they chars that are in VP:lenneth in this one wouldn't they be dead cause this story takes place before lenneth???
2)why is silmera in Alicias body?

i figured out question #2 jus plz help me with 1) or will i find out later in the game uhhh help plzz