Baldur's Gate : The Sword Coast Chronicles : NWN2 Persistent World

I think that Archmage's spell slot sacrifice doesn't work correctly.

I have 5 High Arcana feats: Spellpower 1 & 2, SLA 5th, 6th and 9th. That should be (in order) 5th, 7th, 5th, 6th & 9th.
The spell slots taken seem to be random to me, but perhaps you can make more sense of it. Here's a screenshot with my preparations and logs of what was taken. I prepared the 1st spell that I can cast in alphabetical order. I have also tried to test my CL, which should be 32, by casting Non Detection, which gives the effect of DC 15+CL. Seems like I reap benefits without sacrifice.

I don't know what changed exactly, but I prepared some other spells, and it looks to be fine. If anything, I feel like there's an exploit there somewhere. Screenshot below with an update.

It's working fine for me (spell power 1 and 2). It's supposed to be alphabetical, so I just put the first slot on levels 5 and 7 as Arc of Lightning and Avasculate respectively. It's not spells my character would otherwise cast anyways (especially Avasculate, as a necromancy spell on an illusionist with necromancy as prohibited school).

It's possible some newer spells aren't counted in the spell slot sacrifice script, perhaps?

You might be correct that the new spells might not be sacrificed. What worries me is that there was no CL penalty, so there is a way to cheat the system. I don't think that's profitable, so not a massive exploit, but perhaps worth looking into.