Deep wounds rank 2 bug?

I tried posting this on the bug tracker and failed...
It seems that Rank 2 deep wounds is not working, With the same weapon that i still have rank 1 ticked for 10's rank, rank 2 5's and now that i just dinged and got rank 3 it ticks for 16's
It seems that Rank 2 deep wounds is not working, With the same weapon that i still have rank 1 ticked for 10's rank, rank 2 5's and now that i just dinged and got rank 3 it ticks for 16's