[1、下单方法错误导致](1%E3%80%81%E4%B8%8B%E5%8D%95%E6%96%B9%E6%B3%95%E9%94%99%E8%AF%AF%E5%AF%BC%E8%87%B4.md) [2、商品已变价/优惠券已领完等](2%E3%80%81%E5%95%86%E5%93%81%E5%B7%B2%E5%8F%98%E4%BB%B7-%E4%BC%98%E6%83%A0%E5%88%B8%E5%B7%B2%E9%A2%86%E5%AE%8C%E7%AD%89.md)