You might see a case where the user is saying that the Bill To is not correct. Invoices that are generated by RMR cycling will go to a Bill To that is defined on the RMR line itself. This will default to the Primary RMR Bill To that is selected, not to what is selected on the Site.
Example:

Resolution
Go to the RMR line and change the Bill To on the line itself.
First find the RMR line itself:

Then, select the Bill To in the top right:

This will give you the Bill To options, select the correct Bill To and save.