I just bought a Miche Primato bottom bracket and tried installing it using Park's BBT-5 (the same tool I used to remove the previous bottom bracket, also Miche, but from 2008). The BBT-5 fit into the right hand side cup without a problem, but I had trouble fitting it into the left hand side. I noticed that one of the splines is different than the others. Is this normal, or is this part defective or damaged somehow?
The spline in question is right below "ITALY":
Thanks for any help, I'd like to be sure before I complain to the shop I bought it from.