STPO table issue.

I want the list of bom components from the STPO table. when I go in to STPO table I have 50 lines in the table for the BOM number where as I have only 6 lines in cs02 table. ( I took alternative bom in to consideration and STAS table deleted intems in to consideration). how to get the exact list of current BOM line items.

I am Using ECM.

Regards