在分类下添加的产品，通过接口获取的数据好奇怪

我的产品如下图

通过接口

/catalog/category/product

返回的的数据如下

{
    "code": 200,
    "message": "process success",
    "data": {
        "products": [{
            "one": {
                "name": "aaaa",
                "sku": "101",
                "_id": "5c2f73ac9dc6d61c15740012",
                "image": "//img.aa.com/media/catalog/product/cache/bd935443df1c50537d4edaab4af5d446/296/0/t/28/t281yfxh0nw7q3n1547813597.png",
                "price": {
                    "symbol": "￥",
                    "value": "1.00",
                    "code": "CNY"
                },
                "special_price": "",
                "url": "/catalog/product/5c2f73ac9dc6d61c15740012",
                "product_id": "101"
            },
            "two": {
                "name": "bbbb",
                "sku": "202",
                "_id": "5c741d7c9dc6d6482837bff2",
                "image": "//img.aa.com/media/catalog/product/cache/bd935443df1c50537d4edaab4af5d446/296/0/5/90/590qfwrazo043z21551113774.png",
                "price": {
                    "symbol": "￥",
                    "value": "1.00",
                    "code": "CNY"
                },
                "special_price": "",
                "url": "/catalog/product/5c741d7c9dc6d6482837bff2",
                "product_id": "202"
            }
        }, {
            "one": {
                "name": "cccc",
                "sku": "303",
                "_id": "5c741e189dc6d6229535e792",
                "image": "//img.aa.com/media/catalog/product/cache/bd935443df1c50537d4edaab4af5d446/296/0/l/1d/l1dn6nwg9tpukn51551113741.png",
                "price": {
                    "symbol": "￥",
                    "value": "1.00",
                    "code": "CNY"
                },
                "special_price": "",
                "url": "/catalog/product/5c741e189dc6d6229535e792",
                "product_id": "303"
            },
            "two": []
        }]
    }
}

数据为什么是

"products": [
{
    "one": {"name": "aaaa", ... },
    "two": {"name": "bbbb", ...}
}, {
    "one": {"name": "cccc", ...}
}
]

而不是

"products": [
{
    "one": {"name": "aaaa", ... },
    "two": {"name": "bbbb", ...}
	"three": {"name": "ccc", ...}
}
]

或者

"products": [
{
    "one": {"name": "aaaa", ... }
},
{
    "one": {"name": "bbbb", ...}
},
{
	"one": {"name": "ccc", ...}
}
]

没规律可言呀，奇怪