Hmmmm... That's weird. I have the same mount, and my front motor fits perfectly. Are you sure it's not the motor? Did you try swapping them?
Perhaps they did just drill the holes a bit wrong. If so, it should be easy to slot one of them like you said. That would fix it for sure...
On a side note, I tried my wood symmetrical blades today for the first time (bought them back when I bought the BCP, but just never tried them until now).
I also slid the flybar weights all the way in towards the center hub. I like how it flies much better with this combination! It is much faster to respond, and I can REALLY hold it in a tight hover now. It also performs great in Idle up mode out in the wind. It seems much less affected by the wind than with the flat blades.
I think I am going to get a set of carbons soon. I think I'm ready for them finally