Problem
The customer's membership was manually set to to a specific price, however it changed to a different price because the Billing template was not updated until after the first billing run.
Solution
Check the current billing template for the customer's membership and update it if needed:
Go to the customer’s membership and click Edit.
Verify that the Billing Template shows the correct amount.
If the Billing Template is incorrect, click Edit next to the billing template to update it.
Make sure the updated fee is now correct and save your changes.
By following these steps, you can correct the membership fee for the customer, ensuring it reflects the intended monthly amount.