Guild Wars 2

Hello,
I have 2 pieces of COF armor with "Superior Rune of the Ranger". When i move my cursor on armor or on pants to see the description it says: "Superior Rune of the Ranger (8/6)" but i have only 2 of them in 2 pieces. I had the same problem when i had just one rune, it said "Superior Rune of the ranger (7/6)".. what should i do? I attach a screenshot

Hello!
I’ve an answer about sigils.
Does the Superior sigil of Accuracy, the one with +5% critical chance, give 5% of the player’s critical chance or add 5% critical chance to the one the player has?
For example: we suppose i have 60 critical chance. Will I, with sigil of accuracy, have 65% (65+5) critical chance or 63% (60+(60/100*5)) critical chance? Thank you for the help, Massimo