The balance became less while voting at block 1720344:
>> blockchain_get_block_transactions 1720344
[[
"e102d6eb0548991d403ec5c76f192469bc351faf",{
"trx": {
"expiration": "2015-02-06T17:57:24",
"reserved": null,
"operations": [{
"type": "deposit_op_type",
"data": {
"amount": 136891179999,
"condition": {
"asset_id": 0,
"slate_id": 1832704065200434438,
"type": "withdraw_signature_type",
"data": {
"owner": "BTSEnUYHEkFKX31A97VKyf7TvjZJZHHCLNmV",
"memo": {
"one_time_key": "BTS5NQPijZu4kw9hFjsAdY2R1trLjRmnpAs2cWgvrRB2ekyeuJYzv",
"encrypted_memo_data": "6bb9c247b7e665c4e5c6b6e1cd6249efe66b18fee2c99cae1265d0ed0280d52d2e9e85f92f57a9e826e7d6c45ca2a1d7c597243e8431be3eea8ffed6eb760530"
}
}
}
}
...
},{
"type": "withdraw_op_type",
"data": {
"balance_id": "BTSH3F7MrM6fgavoAdJVXvHiqUxdVF7ZCkL2",
"amount": 136891189999,
"claim_input_data": ""
}
}
]
So there must be something happened at that address between block 1670016 and 1720344. Maybe another short operation(s)?