Same principle, my spacers dont line up with the holes behind, As adapters (which space as well) would, the bolts are still the right size though. spacers are the bolt on/bolt into type.
Iv fitted some bolt on/bolt into adapters before and they came with the right bolts as well. Guess it depends on the manufacturer. An hacksaw and 10mins of your time would sort the bolts out though, seems mental to have the car off the road for days over some slightly to long bolts and the sake of some simple measure/cutting.
Yes, bolts for both. Its exactly the same principle if the thread you are screwing into on the spacer/adapter isn't larger than that in the hub its going to stick out isnt it!
Thus new bolts for both, I did also check prior to ordering that they would work with the alloy wheels as well (ie the taper on the allow wheel bolts is different to what is used on the standard alloys. It didnt so I sent them details of what I required).. Simples