Importing json data creating duplicates and / or missing arrays and nested onjects

Importing json data creating duplicates and / or missing arrays and nested onjects

I've found when using the Import Data function (Import Files and Feeds) in Zoho Reports to import json data from a site's API server, that when I use version 1.0 of the source's RESTful API (versions are the Swagger revision numbers) I get all the data but many of the records are duplicated, and if I use version 1.1 then I get the correct number of records, but I only get the first level of data and all of the arrays and nested objects are missing.

The data is compliant with the specification in  https://reports.wiki.zoho.com/Supported-JSON-Formats.html#supported-json-format

Does anyone have any experience with this import data function, and in particular with this type of problem?