Guild Wars 2

Like the topic says, i feel like im not getting full duration out of my bleeds. With vital shots, you have a base 4 second bleed. I have 25 pts into the Deadly Arts trait line, which should add 25% condition duration increase. That should add 1 second to my bleed, bringing the total to 5 seconds. The problem im having is, I have the full set of Major Runes of the Afflicted on my gear which should increase my bleed duration by 25%. Now im not expecting it to increase the duration 25% of 5 seconds, but shouldnt this increase the duration of my bleed by another 1 second? Currently im sitting at 5 second bleed duration which i believe should be at 6. This doesnt seem like much, but that extra 1 second will allow me to stack more bleed charges on with my auto attack, which can be a significant amount of extra damage.

Maybe I was being a little long winded in my question, so I suppose I will summarize it…

Are Runes of the Afflicted supposed to stack with other Condition Duration increases?