Issues with order line items

[a1780]

We are encountering an issue with order line items. For order 1014 from store yakosy.myshopify.com, there is only 1 item with a quantity of 3 on the store admin page. But when we retrieved this order via REST API, it showed 1 item with a fulfillable quantity of 3 and another 2 items with a fulfillable quantity of 0.

We want to get the same result as the admin page shows.