Pretty sure both of those are bugged yeah. Time to Kill is also bugged for some users, including me. I've beat the game twice and tried to create and obtain the ingredients for the spell multiple times in different orders, but I haven't received the achievement.
For Time to Kill, you get the Blood (from Cathedral) and Spell (from Mines), you merge them together and craft the skillbook, then you click on the skillbook to learn the ability.
Achievement unlocks.