Addition Integrator - WEB ADI

In Additions Integrator, we could see we have a option to provide the Asset Clearing account. Apart from providing the asset category, the WEBADI also has an option to provide Asset clearing account for Asset Addition detailed. This provision overrides the clearing account provided in the asset category level. This asset while getting mass copied to TAX Book is fetching the clearing account from asset category, which results in mismatch in account balance between CORP & TAX Book. Wanted to understand why this provision is placed.