Stripe.com payment integration module

[Gozzandes]

2.1.9 Stripe_module_zc157c installed
Both Stripe and PayPal seem okay.
I ran a few test credit card orders thru stripe, all went okay. Once I hit the "continue" button on the 3rd checkout page, I then rapid clicked the "continue" button to see if I can create a duplicate order. It briefly displays "A processing error occurred." to the left of the "continue" button, but the order completes and there is no duplicate charge at stripe or at Zen.
However, directly after I click "continue" the first time, I see this text displayed to the left of the "continue" button: "TEXT_PAYMENT_STRIPE_PAYMENTSUCCEEDED". That seems odd.
All this is on my duplicate test site. I have yet to role it into my live site.

Everything seem to be OK without "TEXT_PAYMENT_STRIPE_PAYMENTSUCCEEDED" message.

Open the page.
Admin page=>Tools=>SQL Query Executor
and paste following code to "Enter the query to be executed:" field and push "Send" button.

insert into configuration (`configuration_title`, `configuration_key`, `configuration_value`, `configuration_description`, `configuration_group_id`, `sort_order`, `last_modified`, `date_added`, `use_function`, `set_function`, `val_function`) VALUES      
  ('Payment Succeeded Message:', 'TEXT_PAYMENT_STRIPE_PAYMENTSUCCEEDED', 'Payment succeeded. Please wait a few seconds!', 'The message will be displayed after payment succeeded. If you do not want to display it, leave it blank.', 6, 1, NULL, now(), NULL, NULL , NULL); 

or upload mysql_upgrade_to_2.1.7.sql.

Go to Modules=>Payment Modules and select Stripe Payments.
Push "Edit" button.
Feel free to enter a message such as "Payment completed!" or "Zahlung erfolgreich!" or "お支払い完了しました!" in the field at the bottom.