Hi there, 

Since this is your first post in the Community, I'd like to give you a warm welcome! 

It's vital that the customer in question matches your home currency. Once you set up a customer with Canadian currency, you're unable to change them to be a USD customer. If you've already processed transactions for the customer with the wrong currency set up, you'll have to delete the progress and re-enter the transactions once you've created the customer with the correct currency. 

I encourage you to contact one of our support agents so they can have a deeper look into the transactions on your account. Don't hesitate to reach back to me if you need anything else. I'll be on standby.