The character sheet for Aloth says he has 7 lore, but I've given him 2 scrolls that say they require 2 lore and he can't use them (they're greyed out and the lore requirment text is red).

 

Am I missing something?

I believe this has to do with the fact that the spell scroll has to be used in combat. Even if you have enough lore, for some reason the scroll with show the lore requirement as red because it's a combat spell. If you put it in your quick slots and start combat, I believe you'll be able to use it.