" Apparently a strict interpretion of the law means that if you leave the home that is your permanent residence even for one night, the owner of the home and the foreign national must fill out the TM30 and TM 28, respectively."

I can't clear up the murkiness of TM30 but the TM28 is dead simple:
When you move your permanent residence from one Immigration district to another, you must file a TM28. Unless and until you do so, your new office will not serve you.