Error on Kinetick data for different deliveries of Corn futures

[blackhawk]

I have plotted two daily charts of corn futures for different deliveries using kinetick EOD free data connection, but there is some kind of error with the data used in deliveries different from the front month:

Example:

- First chart: Corn futures of july 2013 delivery "ZC 07-13" (front month delivery)
- Second chart: Corn futures of september 2013 delivery "ZC 12-13"

The second chart "ZC 12-13" is exactly the same than "ZC 07-13" (front month contract).

It's like if "ZC 12-13" future is using the same data than "ZC 07-13" future.

I have attached a picture with both charts.
Any help will be appreciated.
Thank you.

[NinjaTrader_ChristopherS]

Hello blackhawk,

Please go to Tools > Instrument Manager, search for the ZC, select it and click the Edit button.

Then in the Instrument Editor window select Merge policy, set to 'DoNotMerge' and press OK > OK.

Then right click on the charts and select 'Reload All Historical Data'.

Below is a link to the Historical and Real Time Data section of our help guide. Please see the Understanding merge policies subsection for further information on the merge policies.

http://www.ninjatrader.com/support/helpGuides/nt7/index.html?historical_data.htm