Lockbox Bill to Location

Hi, we are looking at implementing the Lockbox Interface process, we have our system and lockbox are set to require "Bill to" locations, our lockbox is setup to match receipts by transaction number and the Auto Associate flag is checked. Our auto cash rule is 'Match Payment with Invoice'.

When we process a payment through the lockbox, the system finds the invoice and the correct customer is associated with the payment but the location used is the primary Bill to  vs the bill to location associated with the invoice.

I have two questions

1- is there any issues to consider with the payment going to the primary 'bill to' location vs the 'bill to' location of the invoice, (the invoice is being updated with the payment as shown on the Account Details of the customer as expected).