Premium Cubes, Weapons and PDR Ignore Potential

1st Premium on my rare 3 line ST got 15% boss.
Got an unique arcglaive and jesus cubed it once, then regular cubed it 9 times. 7 of those 9 times had either 15% ignore, 30% ignore, or both on them. 20% boss and 30% boss popped up once each.

FOR SCIENCE(17 cubes used 11/17 had Ignore %):

 Spoiler

This pretty much confirms it.

That's just the messed up description on them. Personally I think this is a bad thing as it decreases the chances of getting better stats (% Boss, % Total Damage.) I'm interested to see what effects it has on other gear. The only other items I cubed were masks and the only thing I somewhat saw repeating a lot was recover x hp every x seconds (From experience masks give these crappy stats all the time, so it's not anything concrete)

% ignore is one of the best stats you can get on a weapon. Ideally, you'd want 30% boss, 30% ignore, 6% total dmg OR 6% atk. I'd say this is a godsend...