这个和支付宝的扣款顺序有关。支付宝的扣款会根据平时的支付习惯默认给你付款，如果平时直接使用花呗付款，它就会按照花呗的支付方式去给你付款。
更改扣款的方法可以在手机支付宝上更改方法如下：
1、打开手机，找到手机里的支付宝应用，点击进入
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https://iknow-pic.cdn.bcebos.com/d4628535e5dde711002d9d54a9efce1b9c166191"/>
2、在进入支付宝的界面里，选择最底部的我的选项
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https://iknow-pic.cdn.bcebos.com/0d338744ebf81a4c02c1326bd92a6059242da6a5"/>
3、在我的选项里选择右上角的设置
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https://iknow-pic.cdn.bcebos.com/2cf5e0fe9925bc31fc7dd83a50df8db1cb137074"/>
4、在设置里选择支付设置
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https://iknow-pic.cdn.bcebos.com/ca1349540923dd54fee27ecadf09b3de9d8248fb"/>
5、在支付设置下方选择扣款顺序
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https://iknow-pic.cdn.bcebos.com/730e0cf3d7ca7bcb42911e8db0096b63f724a8ae"/>
6、在弹出的界面把自定义扣款顺序的开关打开
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https://iknow-pic.cdn.bcebos.com/9345d688d43f87947185908cdc1b0ef41bd53a1e"/>
7、对弹出的选项中用手指长按一项就会出现向上向下的箭头，选择哪个在最前面就是默认的扣款方式
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https://iknow-pic.cdn.bcebos.com/f2deb48f8c5494ee6801d4bb23f5e0fe99257e75"/>
注意：选择余额宝或者余额确保里面有足够的金额