So I did the quest with Kachiko and Yoshimo no the island with both families, I used the good way (Yoshimo and Kachiko are reunited in the end, Kachiko's father did hara-kiri).
Now I'm in spellhold and Yoshimo betrayed me. Is that supposed to happen? I read in the walkthrough on this forum that when you do the quest the good way, he's not supposed to betray you. Is it something that happens later that makes him come back?