Viper Ultimate has a major sensor flaw.

I replaced my first Viper Ultimate through Razer support because when I shook the viper back and forth it would rattle. I was trying to determine if it was a loose sensor or scroll wheel so I put black tape over the sensor and when I shook the mouse the cursor would move on the screen. I wasn't violently shaking it but just moving it like I would during a flick. I received my second Viper Ultimate today as the replacement and I still have the rattle issue and the sensor moving on screen is worse than before. I am wondering if this issue is with every Razer Viper Ultimate or have I just been very unlucky. Unfortunately I am past my return date or I would just get a full refund because if i spend $150 on a mouse I want it to be without issues. Is anyone else having this problem?