I just replaced my bottom bracket using another one of the exact same make and size (Sunlite 68mm x 103mm square tapered shaft cartridge). It installed smoothly and everything seemed to be going well until I tried to attach the crank arms. For some reason, the sprocket on the right arm is bottoming out on the square shaft before it can be torqued down at all, so the whole crank arm/pedal is forced to either be loose or to scrape against the flange of the bottom bracket.
The brackets are clearly different, but they have exactly the same text printed on them. What can I do to fix this?