I've checked all your plans, your new pricing discount structure is $5 and $10 off per month for 6 and 12 months payment respectively instead of 5% and 10%.Good Mornin!
The 5% and 10% is already built into the listed cost.
So the MVPS-2 is regularly
Semi-Annually: $450 (5%)
Annually: $840 (10%)
Then the coupon stacks ontop of that. Hope that helps to clear things up!