It appears that the spell Protection from Evil 10' radius (override/sppr408.spl, part of the EasyTutu_ToB Core files) is badly bugged - it has only a single ability compared with 14 for the original in Spells.bif. More specifically, the EasyTutu version doesn't protect against summoned demons. As there aren't many such creatures in Tutu
it would be a marginal issue, however it does lead to a certain BG1NPC addition not functioning as intended.
AFAICT neither BG1 or BG2 Baldurdash make changes to sppr408.spl, so I don't know where this version of the file came from. Macready?
edit: Eh, this topic would probably be better off in Bugs & Support... Too late for me to do anything about it though.