Sorry to hear of your woes mate. Please do search out the "Dealership Praises and Woes" thread and add your comments there too so that other users dont have the same problems.
Sounds to me like they havent done it on a Zed before, or at least the technician you had hasnt. Anyone whos done Brembos before knows they have 2 nipples per calliper. They are also notoriously hard to bleed. I had mine done at a repuatable inderpendant and it took us a few goes to get it to work, but we wouldnt leave it until it was done properly. However, you can think it is done doing a static test, and if you dont know how its meant to feel, you might think its right. Also if they managed to let air into the system (master cylinder run dry), then its even more of a sod to get all the air out. Nissan should know better though