5hunters with aspect of the pack

hailll hydra, so yea aspect of the pack give 5 % combat advantage, funy party is with 5 ppl everyone get 5% CA,
but if another 4 ppl in my party is HUTERS and if thei use same aspect of the pack, all 5 ppl get + 25 % CA,
so or its bug. and or its will supose stack ?:3 ty for ansver