position.pos_short_his 和volume_short_his显示不一致

上面是昨天夜盘position字段，45分别显示在pos_short_his和volume_short_today上面。simnow模拟环境。所以交易所的volume字段永远不要相信对吗？还是只是simnow的问题？

这里pos_long_his应该是对的，但是volume_long_today还是显示值。如果我按照volume long today关仓的话，就会影响关仓了。还是大家都直接不用closetoday，直接反向锁仓？或者能否明确pos_long_his/today肯定是对的，volume那个就是不要用吗？主要我担心有时候别pos_long_his/today也会出错？
CFFEX.TF2609: {‘exchange_id’: ‘CFFEX’, ‘instrument_id’: ‘TF2609’, ‘pos_long_his’: 14, ‘pos_long_today’: 0, ‘pos_short_his’: 0, ‘pos_short_today’: 0, ‘volume_long_today’: 14, ‘volume_long_his’: 0, ‘volume_long’: 14, ‘volume_long_frozen_today’: 0, ‘volume_long_frozen_his’: 0, ‘volume_long_frozen’: 0, ‘volume_short_today’: 0, ‘volume_short_his’: 0, ‘volume_short’: 0, ‘volume_short_frozen_today’: 0, ‘volume_short_frozen_his’: 0, ‘volume_short_frozen’: 0, ‘open_price_long’: 106.43, ‘open_price_short’: nan, ‘open_cost_long’: 14900200, ‘open_cost_short’: nan, ‘position_price_long’: 106.415, ‘position_price_short’: nan, ‘position_cost_long’: 14898100.000000002, ‘position_cost_short’: nan, ‘float_profit_long’: -8400, ‘float_profit_short’: nan, ‘float_profit’: -8400, ‘position_profit_long’: -6300.000000001863, ‘position_profit_short’: nan, ‘position_profit’: -6300.000000001863, ‘margin_long’: 327758.20000000007, ‘margin_short’: nan, ‘margin’: 327758.20000000007, ‘market_value_long’: nan, ‘market_value_short’: nan, ‘market_value’: nan, ‘pos’: 14, ‘pos_long’: 14, ‘pos_short’: 0, ‘last_price’: 106.37, ‘margin_long_his’: ‘-‘, ‘margin_long_today’: 327758.20000000007, ‘margin_short_his’: ‘-‘, ‘margin_short_today’: ‘-‘, ‘market_status’: 1, ‘open_cost_long_his’: ‘-‘, ‘open_cost_long_today’: 14900200, ‘open_cost_short_his’: ‘-‘, ‘open_cost_short_today’: ‘-‘, ‘position_cost_long_his’: ‘-‘, ‘position_cost_long_today’: 14898100.000000002, ‘position_cost_short_his’: ‘-‘, ‘position_cost_short_today’: ‘-‘, ‘user_id’: ‘265317’, ‘volume_long_yd’: 14, ‘volume_short_yd’: 0}