Auto-combine function does not work in GTI (NWBC)

it is about golden tax system in China.

I have an original billing document A, and cancelled it via VF11 and generated its cancellation billing document B, but when I am trying to create the outbound file for create golden tax invoice. I still can search these two invoices out in NWBC. I think these two invoices should not be searched out, is that right?