问为什么商业定价规则在降价前先涨价？

EN

{ "rules_wholesale_discount" : {
    "LABEL" : "Wholesale Discount",
    "PLUGIN" : "reaction rule",
    "OWNER" : "rules",
    "REQUIRES" : [ "rules", "commerce_line_item", "commerce_product_reference" ],
    "ON" : { "commerce_product_calculate_sell_price" : [] },
    "IF" : [
      { "user_has_role" : {
          "account" : [ "site:current-user" ],
          "roles" : { "value" : { "2" : "2", "3" : "3" } },
          "operation" : "OR"
        }
      }
    ],
    "DO" : [
      { "commerce_line_item_unit_price_multiply" : {
          "commerce_line_item" : [ "commerce-line-item" ],
          "amount" : "0.5",
          "component_name" : "discount",
          "round_mode" : "1"
        }
      }
    ]
  }
}