Melee Retaliation computed wrong?

[Achievement:BugFound]

I have a level 30 Skeleton with a lite that does 13 damage, boots that do 16, and armor that does 13, for a total of 42, and indeed when I get hit, this is what happens. However, when I hover the mouse over my icon, it lists "Melee Retaliation: 72" for some reason. Any ideas why? I have the character save if it helps.

EDIT: Think I found it: I also have an amulet that gives a 30% chance to blind, and this "30" is erroneously added. The "on_melee_hit" lists:

PHYSICAL 13
DARKNESS 0
BLIGHT 8
FIRE 13
MIND 8
ITEM_LIGHT_BLIND 30

So, the last one should not be included, when adding up Melee Retaliation to be displayed.