What should I try to ensure that new Pro Sites customers are created as new customers in Stripe?

I have ProSites configured with Stripe as my payment gateway (on frenchquest.ca). I’ve recently updated the API and copied over the new keys. I tested it and thought it was working; however, anytime a new customer joins, instead of creating a new customer profile in Stripe, it simply edits the last customer’s details and replaces it with the newest customer and appends that one customer account to have multiple subscriptions associated with it.