MFBF backflushing

Hi Gurus,

I am working on MFBF backflushing scenario.

When I do the backflush of a header material XXX, system showing all the child material with 261 movement, which also include the Phantom materials say YYY with 261 movement.

It does not appear to be logically.

What phantom material is also appearing?

Can anyone throw light on this..

Srini