splitting PCA

Dear Expert,

I am using ECC Version 6.00

I activated FI document splitting based on business area and profit center. I have already done the required customizations. In case I post a document with entering business area and profit center in one line item only and simulate document on entry view, I expect system to derive BA and PCA from such line item to other lines. But it only derive BA to all line item in entry view, and derive PCA to all line item in GL view. How can system derive PCA to all line items since entry view also, or this is the standard concept of splitting in New GL Accounting.

Regards,

Sumalee.