Thanks again for looking into it - the workaround with Dak'kon is quite nice, but yeah.. I decided to go through with the new game just in case I might get stuck somewhere along the way with this bug.
I left the Tome o' Cheats in the mortuary (to not get tempted later ) and (in case you still want to look into it) I uploaded a savegame where I now have the tome, the teeth and Moridor's box - all not working properly from TNO's inventory.
And I don't really play PS:T for the challenge - more like an interactive book - that's why I cheated.
thank you for intervening so soon.
I was thinking about posting this directly in one of the mod forums but then I wanted a 2nd opinion first before wasting your time.
Well.. too late
To 1: I have INT 18 and WIS 22 by now. Your remark made me remember that I used your Tome o' Cheats to boost STR/DEX/CON/CHA by a few points and I think INT by 1 in the beginning (wanted to experience more of the game while not missing the old stuff). If that is (part of) the problem.. well.. I tempted my fate
To 2: I saved/loaded, reinstalled and did about everything I could think of.
For reference I made a new game (INT17, WIS18), ran through the mortuary and picked up the teeth, Dak'kon and the box. Both the teeth (hilarious btw) and the box worked fine - the circle of Zerthimon however still doesn't let me do stuff (I haven't leveled up so far though).
Never thought I'd actually be one of those posters that accidentally end up posting as a guest because of cookie error.
The above is me - it's just too late <yawn>.