Captilalizable flag derivation logic

Summary:

Hi

We have customized the Project costing standard cost collection flex field for expenditure batch to automatically derive the capitalizable flag (Y/N) based on the expenditure batch creation date and project dates. While trying to enter an unprocessed transaction online, this customization is able to default the capitalizable flag (Y/N) without any issues depending upon the creation date and project dates. However when we use "create costed or accounted" adfdi and leave the capitalizable flag blank, its deriving the task level capitalizable flag from the financial project plan instead of deriving the cost collection flex field. Is costed or