Hmmm. So far I'm unable to find a reason for what you're seeing with Talisman of Holy Perception. Following all the logic through again and again, it keeps coming up flawless from what I can see. The current operating theory is that the item you found wasn't a Talisman of Holy Perception but was listing as one... I don't know how that could happen, but if it did, it might result in what you saw... Can't think of another explanation based on what I'm seeing. I'll keep my eyes out!