Membership 2 Pro Payment Subscription Question

I have a membership level named “Gold”. I have existing invoices that need to be paid for this level. But I had the level formatted to be a subscription level. That needed changed. But the existing invoices all still want to process as a subscription. When I add new members after the pricing was changed to a one-time fee, they still seem to be processing as a membership.

I have billing details and need to process payment for approximately 50 new members, and I need to make sure it’s just a one-time payment.

I feel I must be missing a setting somewhere or something. Any insight is much appreciated!