JSON to Table Node duplicates columns

Hi,

I have a JSON string which I'm inputting to a table using the JSON to Table node. The JSON string consists of "Itineraries" within which exist sepearate "Itinerary" elements.

However, when this node reads the JSON string it sees all element names as unique and duplicates the column names so all of the JSON data is in one row when it should be in two rows. This means what I expect to be around 60 columns is 120.

My JSON appears to pass through http://jsonlint.com/ as valid so I'm a little unsure as to what else could be the problem. 

Thanks for any assistance in advance,

Bernard