BAPI_ACC_GL_POSTING_REV_POST - Mass Reversal

Hi Experts!!

We are using BAPI_ACC_GL_POSTING_REV_POST bapi for doing reversal of docs. We gave a docnumber, say, 1234 with objkey 1111. Now when i gave the data to the BPI, it's reversing all the docs with objkey 1111, though i explicitly mentioned docnumber 1234. Is this how the bapi works? Need confirmation.

Thanks a lot in advance!!