Sorry, I still don't understand. Could you provide the test procedure, device and the enviroment?
In photos, BMA490L x-axis 3.89, y-axis 3.95, z-axis is 0.06, the unit is g?
If you keep sensors static, and the values of accel is same, x/y/z nearly 0,0,1 g. If your change sensor position, such as x-axis perpendicular to the earth, x/y/z nearly 1,0,0?
While, if your move sensor with 4g accel, sensor's output is different, nearly 10%-20% difference?
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