Hardware & Technical zowie ec2 evo cl problems?

so i recently got myself a zowie ec2 cl, and i'm wondering if anyone has any experience with it?
out of the box, the mouse was too "low" so the ring around the sensor was grinding on my mousepad, and i'm also having it pixel-walk at 450dpi.
have i just gotten a broken one or is this just common problems with the cl?
 
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