Hi,
We have been working on moving the orders tab in our app as well as API to a new version, and the orders API is affected by this currently. The version of the app you are using will determine the API you should use. If you see a button to split an order in the UI, you are on v3.
I’m not sure what a CP is.
If you are creating orders using the old version of the API, but you are on v3, those orders will not be visible in the app. You must use the temporary v3 orders API to see orders in the v3 version of Ordoro.
Here is a support article regarding API versions https://support.ordoro.com/which-api-version-should-i-use/.
Here a link to the documentation for the order splitting endpoint and also the v3 API documentation. https://devapiverson.docs.apiary.io/#reference/order/orderordernumbersplit
Also, thank you for the heads up on the original order split documentation you mentioned, this is not used and unreliable, and we will be removing it from the API and documentation.
Hope all of this gets your orders going!