I bought in january Lighroom 5 Student&Teacher version. Now I have tested the new features of version 6 and like them. Now I have to consider a purchase of Photoshop.
The problem is that I have found a limitation to one purchase of one product with Student&Teacher licence pro year.
My question is if I would buy now the full version (comercial) of lightroom, would I be able to buy now the Photoshop as a Student not waiting till january 2016?
I don't know the answer to your specific questions, but if the two Adobe products you want are LR and PS then just sign up for the Photography Plan for $10/month for a year and you'll get both for $120 for one year. This is the normal price for everyone, and there's no cheaper student price.