From what people with insider knowledge have said, this level of skew is NOT legal, but PGM is merely trying to stretch the limits of the setup options.
Testing doesn't have inspection, so you are free to try things that otherwise would not be allowed come race week. But by exagerating the adjustments, it makes it easier to see what the effect of each change does to the car, instead of chasing a red herring that might have been caused by something else instead.