If you get some of the rear set bolts they are exactly the right length, your dealler should have them or you can order them online. But yeah you could cut them too.
Perfectly normal, my PVM wheels are like that too, if you really want to get trick, you can order Ti bolts from Yoyodyne, and save another half pound.but is this normal with all marchesini rims? anybody else have this problem? surprised they dont mention something or include them in with the rims