Bungie, you know this is an issue. You've commented "we're looking into it" on every post I've seen, dated back over a year. I want a direct response from you now.
Fix the IB title triumph to collect 15/15 IB weapons. I have 20/15 with no triumph, as so many other players. So are we -blam!- because of your programming? Fix it, this issue is on you.