WM backflush components for network order 281 movement via WM PP interface

Hi:

Has anyone worked with Network order via WM-PP Interface?

Network is created via tocde CN22.

Through LP10 we run the WM staging, all goes well and the TR gets created from LP10 and TR has the destination storage type as 100 (Production staging) with WM movement type of 319.

To is created from the TR (from above) with destination type 100 and confirmed.

We execute 281 via MIGO and inventory is relieved from 100 storage type BUT new TR is created from the 281 movement type.  I don't think it should create a new TR since inventory is no longer in 100 anymore, it has already been back flushed.  Any idea why another TR is getting created?  How do I avoid another TR from getting created, for the 261 movement we are not seeing another TR getting created.

Thanks in advance.