class and charecteristics in functional location

Dear All,

This is regarding class and charateristics in functional location

we have craeted charateristics CH1, CH2, CH3. These characteristics accept values 'YES' and 'NO' only.
Also created classes CL1, CL2, CL3.

And, assigned chracteristics to classes as follows:

CL1 -> CH1, CH2, CH3
CL2 -> CH1, CH2, CH3

CL3 -> CH1, CH2, CH3

These classes CL1, CL2, CL3 have been assigned to functional location D-UTIL-BL through IL02.

In this functional location, adding values to the chracteristic CH1,CH2,CH3 in class CL1.

Surprisingly, the chracteristic values getting copied other classes CL2, CL3 in the same functional location.

Please advise how to avoid getting copied all values from one class to another class in same functional location

Thanks & Regards