can someone please explain me why this transaction has not be confirmed yet? https://blockchain.info/tx/946cacddf93116e4511fd5a47ab01bdb9e68679cd6a11de794fad126af3d3ec0
even if it has 0 fees:

It is smaller than 1,000 bytes.
All outputs are 0.01 BTC or larger.
Its priority is large enough (411159279*69/225)

thanks