Unless you can identify why this transaction failed, you will not be closer to solving the problem: {'expiration': '2018-03-15T15:52:59', 'ref_block_num': 13774, 'ref_block_prefix': 1848545560, 'operations': [['transfer', {'from': 'elf', 'to': 'leprechaun', 'amount': '10.000 SBD', 'memo': 'multi-factor send'}]], 'extensions': [], 'signatures': ['1f058ee42ec67da75fe773c8a4f5ea9b4b54a67d5eb3659e8cc878c596aa7aa18158793db8d8f3d2b12ce5bda80c2e95399ec9961bbf0f47c177c8702562129874', '1f7d9e6056aa6d5e1a35f4753ae4f4c0f6c5b6f71138b505e7f357babb18df71691725b656f86715af6c29614306f24ffd7b61aa4f50767a7d02d5dc37e0bc95e8']}

It says "Missing Active Authority elf". Now, elf has 8/9 weight/threshold and steemfiles has 1/9 weight threshold in active. I think that means that these two signatures from steemfiles' active key and elf's active key should be enough. It seems I have this principle wrong somehow.