If you've got dialogue appearing in item descriptions and things, that is probably not quest pack's fault.
I think it means your dialog.tlk is messed up, and I think the only solution is a reinstall from scratch because the problem will keep cropping up otherwise.
I think one of the ways this happens is if you try to install a mod with the game running, or installing 2 mods at once, or something similar.
Strange that you say you have no other errors though - it's only the djinni's dialogue that appears in odd places? No other dialogue? If it's just the former it could well be something else at work, as I don't think a jumbled up dialog.tlk would care to only give you one character's text in odd places, but rather everyone and everything's...