yeah i agree, set relocation can really mess the blocks up and make your phone guys cuss you. but if you can hound dog the phones back to the blocks, just switch the copper to the new jack and punch it down. that way you dont even have to mess with any ports/extensions. and when i mean "hound dog" i mean use a toner (toner/sniffer or some people call them "fox and the hound") that plugs into the jack, then go to the block and use the other device to listen for the tone, do this for both old/new phone locations, and just unplug the copper and punch down the new. then you can rename or whatever you have to do once you get everyone where they are meant to be (physically).
hope that makes sense, i just re-read it and it might sound confusing.