Changing the ride height on vehicles with macpherson strut suspension will generally cause camber to change, but, interference between the knuckle and the strut is something that I would have considered as impossible, that is, assuming the installer knows what they are doing - the strut bolts to the knuckle in two places, so, assuming that the correct strut is being installed, it will only contact the knuckle where it is bolted to it.
Just so you're aware of it, Low Range Off Road has downloadable installation instructions on their website, so you can download them and verify that the work has been done correctly.
Back to the camber - lowering the vehicle will cause it to go negative, lifting will cause it to go positive, a two inch lift on one of these will generally not cause enough of a camber change that it cannot be corrected using camber bolts.