Yes. The rods need to be resized when the rod bolts are replaced. I have seen some disagree, but IMO it is imperative. Think of all that's at stake. Nuff said.
Yes, if you replace the rod bolt, it's best to have the crank bore refinished as replacing the bolts can make the cap fit differently to the rod. any mis-match can cause the drag on the crank up to locking it up completely.