WOW I'm not the only one! Whew!
I replaced all tires $1400 then one year later noticed same wear as you. Replaced rear tires and had 4 wheel alignment and some other stuff $3000. Now six months later I notice inside wear again. I called yesterday and they say X5 has a negative camber and that's the way they are. Going to call BMW shop today and see what they say.

I'm also going to check into what jst2878 suggested.

OzE53, Keep us updated