Dis-aggregation not as expected in DP

Hi, I tried to find if there are some posts on this but couldn't find any. Please help understand.

KF1 is set to dis-aggregate based on APODPDANT, and the negative values are not allowed for KF1.

There are two CVCs for a particular product (say, P1).

CVC1 has APODPDANT = 1

CVC2 has APODPDANT = 0

When the value, say 8000, is entered at P1 (aggregated level): the expectation is as below:

CVC1 should have KF1 = 8000

CVC2 should have KF1 = 0

While what is happening is:

CVC1 has KF1 = 8009

CVC2 has KF1 = -9

Since KF1 is not allowed to have the negative values, the value is obviously not saved at the aggregated level.

What can be the reason for this method of dis-aggregation?

Thanks for some hints on this.

Regards,

Guru