Rune of Fulguration

[Hokushin]

I have 2 runes of Fulguration, both look identical, but for some reason they dont stack. Am I the only one having this issue or is it a known bug?

[Rhambuk]

Tried identifying them?

[Thulack]

http://everquest.allakhazam.com/search.html?q=Rune+of+Fulguration&sourceid=Mozilla-search