Xfinity Equipment Delivery

Hello, I recently set up Xfinity Service. I had requested an August 1st delivery date (about a month from when I wrote this) and submitted the order. However, I realized that it was going to my service address which I will be moving into on Aug 7th, and not my current address. I attempted to contact Xfinity through chat to update the delivery address but was told that wasn't possible. Instead, I was told that the delivery would be cancelled and I could pick up all the same equipment from the store. 

I want to make sure that the following are the case:

1) All the equipment; Storm Ready WiFi, XFi Router Complete package, and the starter kit can all be picked up at an Xfinity store. 

2) I will not be billed for secondary equipment delivered to a place I am not currently living; I was told this wouldn't be a problem but want to guarantee it. 

I also want to ask why the delivery address could not be updated so far in advance. 

Thanks very much to whoever reads and replies.