Pro Sites + PayPal Payments Pro + Coupon not working

I have the following setup:

Pro Sites Version 3.5.1.6

WP – latests

PayPal Websites Pro integration

Price Levels: Premium:

1 month – $10/month

2 months – $8/month

12 months – $6/month

Coupon – HALFOFF

When coupon is applied, during checkout it shows the pre-discounted rate. Client was billed full amount so needed to reverse order.

Is this a bug? Do I have my configurations wrong?

Please advise. Thanks!