Watchful Twins - Map Icon

I beat the watchful twins in normal, however when I got to them again in Cruel, the icon had them "X"ed out - making it seem like I beat them again in Cruel.

Upon killing them again in Cruel, I received the secondary 10% lighting res, but the map icon made it seem like this was already completed prior to beating them.

Slight necro, but the 10% lightning res is from Sisters of Garukhan, not Watchful Twins.