I had this exact same issue when trying to change the shipping address on mine. I couldn't find any way for it to stop adding APT at the beginning, so I just am having it shipped to the main account address since I know someone will be there to sign for it. I didn't want to run into any delivery issues with the way they were formulating the address, but man so frustrating!Actually had some trouble this year with verizon and had to cancel + reorder. Their online portal struggles with adding an apartment number. when i added:
MyAddress
APT 309
CITY, STATE
it kept translating that to:
APTMyAddres309,309, City State
had to just leave the apartment number off and figure it out when it ships.
That being said looks like verizon had plenty of inventory still for pro max shipping on first day (9/22) still whereas apple is already pushing back into october