Discounted SW purchase

I am planning to purchase a discounted SolidWorks Student Edition license that is currently on promotion(%50). However, I already have an active student license which will expire in few months.

Before purchasing, I have two questions:

1. If I buy the new student license now, will the 12-month period start immediately, or only when I activate the license key? If I purchase a student license now but don’t activate it immediately, will the 12-month validity period start from the purchase date or from the activation date? Can you help me about this?

2. The package includes CSWA and CSWP exam vouchers. Since I have already completed both of these certifications, is it possible to request alternative vouchers instead (such as CSWPA certifications, Simulation, or Flow Simulation)?
 

Edu SOLIDWORKS Certification