These things being simple and mechanical are often imperfectly implemented. If you want to, grind or file down the feet of the caliper mount to make the pad fully engage the rotor. Mine doesn't, either. I won't bother with such fiddly work. The slightly reduced contact area means slightly less brake power and slightly greater pad wear. It just is not that important. But you do have a point! And my reply is, it works, it is OK-enough, and there is
a professional jig by Park Tools that could rectify the issue painlessly, but just not for free.
You can make all corrections with a simple file and a lot of patience.
It should not be surprising, that these simple/complex things are made by humans who, for the salaries they earn and the time constraints they are forced to work within, cannot produce perfect goods. It is evident, however, that they try.
I am pleased, however, with the great number of things that our slaves, our poorly paid Chinese laborers, get right for us for ten cents on our dollars.
