You say "hitting" but I'm not sure exactly what that means. If the seat touches these bolts but installs properly and doesn't move around any, I wouldn't worry about it. If the bolts are rubbing the seat enough to cause damage to the seat or affect its installation or function, then I'd call Lepera - there's always the possibility you were sent the wrong seat. Or perhaps the 2015 Harley's are so new that Lepera isn't even aware of this issue yet.