Fiexed Asset Alternative Ledger D2 cost account

The user attempted to switch off the tax ledger (D2) auto postings in the JDE.

When she does this she logs out of JDE and  clear the cache and then logs back in again once she receives confirmation the cache has been cleared.

However upon posting the batch she discovered that D2 (tax) entries had automatically been created from the AA ledger except only for the asset receiving the cost and not the one it was taken from so this is inconsistent in itself even without the fact that she had turned off auto postings.

Could you please advise why this is happening and /or what we can do to prevent it?