Are you factory ride height? Alignments on lifts/lowers are a funny thing and I know to preserve your CVs you have to make a slight adjustment.

I ran super soft Yokohama AVSs on the factory rim for about a year sometime back and had no issues with inner wear. Probably had about 15k miles on them.

I did have the same issue on my WRX when I lowered it. Alignment would not help, even a performance alignment. It was concluded that the problem was the wheel offset, which was the same as stock (same size wheel/tire, just aftermarket). Going from a 52+ to a 44+ solved it.

Very strange....