order:mail different than user's profile email

Currently using Drupal 7 with Ubercart for recurring payments. I have a rule that sends invoice to order:email upon each recurring payment, which works fine. The issue is the order:email address is different from the email address in the user's profile screen, so the user never gets the invoice. Somehow a different email address is linked to the orders and I cannot find where to update/correct that address. I've looked all over the site and googled it, but can find nothing. Any help would be appreciated.