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!