Enemy Spawning at Wrong Level

[StarlessKnight]

I'm trying to do the mission "Unmask Arakhn's ally" from ShadowStar.  I accepted the mission at 31.  Everything seemed fine until I got to the end.  Archon Vyzir spawned at level 35. My difficulty is set to -1 level to help with End issues at that level, so he should have been 30 or 31.

[Frostmoon]

Huh. I had something similar happen, which I posted here.